JPH1056620A - Television receiver, recording and reproducing device, data recording method and data reproducing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prolong the service life of a head driving system and to reduce the generation of frame omission by providing a storage part for data while having a write pointer and a read pointer. SOLUTION: A ring buffer 3 has a recording medium 30, write pointer 31, read pointer 32 and final position pointer 33. While receiving the restarting instruction input of a user, a control circuit 6 continues the write of the write pointer 31 performed after that input, controls the read pointer 32 and performs reading while successively advancing the address from an address, which is applied from the read pointer 32 when that input is inputted, at the starting of write and advancing the reading speed of the read pointer 32 higher than the write speed of the write pointer 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver, a recording / reproducing apparatus, a data recording method, and a data reproducing method, and more particularly to various recording / reproducing functions such as a playback function provided with a large-capacity RAM means. And a recording / reproducing device incorporated as a large-capacity RAM means in this type of television receiver, and a data recording method and a data reproducing method which are improved.

[0002]

2. Description of the Related Art In recent television receivers, an image memory is mounted on the television receiver, and when a user watches a television broadcast signal in real time, the television receiver receives an instruction from a viewer to input an instruction. There is a model equipped with a so-called playback function, in which a part of a program being broadcast is recorded as a moving image and reproduced, whereby a past broadcast signal which is a certain time period from the present time can be reproduced at any time.

[0003] With such a function, in a commercial, a quiz program, a cooking program, or the like, what a viewer wants to take note of can be immediately recorded, which is very useful for utilizing broadcast information. It is valid. Still other television receivers incorporate various functions, such as those equipped with a function of dividing and displaying a plurality of programs on a screen at the same time.

As a recording medium of a recording / reproducing apparatus mounted on such a television receiver with a playback function, it is necessary to use random access (RAM) means capable of large-capacity recording. In the case of using a memory, the cost per bit is high and the cost is high. For this reason, it is conceivable to use a hard disk drive device that can be regarded as a kind of RAM means. However, a normal hard disk drive for a data processing device generally has only one recording / reproducing head (hereinafter referred to as a recording / reproducing head) for one recording surface. It is.

[0005] In such a recording / reproducing apparatus with a playback function realized using such a normal hard disk drive, when the user watches a program in real time without using the playback function, the recording of the hard disk drive is performed. Since the reproducing head only needs to record the broadcast signal, a normal recording operation is performed. The normal recording operation is, for example, in the case of a single-sided recording hard disk drive, an operation of sequentially recording signals on tracks while moving the recording / reproducing head from the outer periphery to the inner periphery of the hard disk. It is.

On the other hand, if the user uses the playback function while watching a program in real time, the recording / playback head performs an operation of recording a broadcast signal and a playback operation for playback. Repeat alternately in short cycles.

As described above, the conventional recording / reproducing apparatus realizes the playback function by alternately repeating the recording operation and the reproducing operation using one recording / reproducing head.

[0008]

However, in a recording / reproducing apparatus for executing a special reproduction such as a playback function, if the recording / reproducing apparatus is constructed using the above-mentioned ordinary hard disk drive, one recording / reproducing apparatus is required. Since the recording operation and the reproducing operation are alternately repeated by using the dual-purpose head, noise is easily generated, and the frequent repetitive operation shortens the life of the head drive system.

In such a recording-only operation of a conventional recording / reproducing apparatus with a playback function, data is usually recorded on adjacent tracks in order from the outermost track to the inner track. I was Therefore, when recording is completed up to the innermost track, the head needs to perform an operation of jumping over a large number of tracks and returning to the outermost track position in order to perform the next recording. Was. For this reason, when one recording / reproducing head repeatedly performs recording and reproduction operations, not only does the phenomenon that a frame of data to be recorded is dropped occurs, but also from the innermost track to the outermost track. If the head moves a long distance, such as when the head moves to a different track, frames generated during the movement cannot be recorded.
Another problem was that the number of dropped frames increased.

Further, in the recording operation of the conventional head, as described above, the recording is sequentially performed on the track while moving from the outer peripheral portion toward the inner peripheral portion. For this reason, when the recording is completed up to the innermost track, the recording head is returned to the outermost track once, and the recording operation is performed again from there. Was.

The present invention has been made in consideration of such problems of the conventional apparatus, and has a special effect that noise generation is smaller than that of the conventional apparatus, the life of the head driving system can be longer than that of the conventional apparatus, and the occurrence of dropped frames is small. An object of the present invention is to provide a recording / reproducing device with a reproducing function.

Another object of the present invention is to provide a data recording / reproducing method capable of making the movement of a recording head more efficient than in the past, in consideration of such problems of the conventional recording / reproducing apparatus.

Further, in the configuration of the conventional television receiver equipped with the playback function, as described above, it is only possible to play back a past broadcast signal which is a certain period of time from the present time. The use of the bag was limited to a single time and only a single channel in a short time, and the range that could be actually used was narrow. Further, for example, when playing back an image in which a part of a program is recorded and playing the recorded video in full-screen display, there is a problem that a program being broadcast cannot be viewed during the playback. Had occurred.

For example, if the sports program A is extended and there is a program B that the user wants to watch on another channel from the scheduled end time of the sports program A, the program B of the other channel is first recorded as a counter program. It is thought that we should do it. However, in this case, after watching the sports program A, if the user watches the program on the other channel, the user stops watching the sports program A and starts the program B from the middle of the program B on the other channel. After watching, the part from the beginning of the program B is reviewed.

[0015] If the program B is a drama program in particular, the beginning will be seen after the end is seen, and this will not be interesting, so it is not preferable for reproduction of video software. Therefore, in such a case, it is conceivable to record the broadcast extension after the scheduled end time of the sports program A, which has been watched earlier, and watch it later. There is a case in which the continuation of the sports program A that has been performed is worrisome. Therefore, in the configuration of the conventional television receiver, as described above, when the sports program A is extended, if there is a program B to be watched on another channel, the user can watch through one of the programs. Will have to give up.

The present invention has been made in view of such circumstances, and even when a broadcast of a program on a certain channel is extended, a program A with the extension and a specified broadcast time of the program are extended. It is an object of the present invention to provide a television receiver which allows a user to watch a program B broadcasted on another channel later without interruption within a scheduled time.

Another object of the present invention is to provide a television receiver which can be watched without interruption from the beginning to the end even if the viewing of a desired program on one channel is interrupted. Further, the present invention provides a television receiver which allows a plurality of programs to be watched on a plurality of channels to be watched through from the beginning to the end without interruption, within the expected time. The purpose is.

[0018]

According to one aspect of the present invention, there is provided a television receiver, comprising: a tuner for receiving a television video signal; and a video signal received by the tuner. A data storage unit including a data storage unit that stores the video signals in time, a write pointer that writes the video signals in the data storage unit in time series, and a read pointer that reads out the stored video signals in time series; A selection means for switching between a reproduced video signal output from the data storage means and a video signal output received by the tuner and outputting one of the output signals; and a data storage means, Control means for controlling the operation.

According to a second aspect of the present invention, in the television receiver according to the first aspect, when a write instruction signal is input as the external input signal, the write pointer of the data storage means starts writing. When a reproduction instruction signal is input as the external input signal, the read pointer of the data storage means starts reading, and the selection means selects and outputs a reproduction video signal from the data storage means. It was made.

According to a third aspect of the present invention, in the television receiver according to the second aspect, the data storage means is provided between a time when the write instruction signal is input and a time when the reproduction instruction signal is input. The read pointer is for reproducing and outputting, as a still image, the video signal output from the tuner when the write instruction signal is input.

According to a fourth aspect of the present invention, in the television receiver according to the first aspect, the television receiver has two or more tuners, and when a write instruction signal is input as the external input signal, the selection means operates. While selecting and outputting a video signal received by one tuner, the write pointer of the data storage means starts writing a video signal received by another tuner, and outputs a reproduction instruction signal as the external input signal. Is input, the read pointer of the data storage means starts reading and reproduces the video signal received by the one tuner, while the selection means reads the reproduced video signal from the data storage means. This is to select and output.

According to a fifth aspect of the present invention, there is provided the television receiver according to the first aspect, further comprising a plurality of tuners, wherein when the write instruction signal inputted as the external input signal is inputted, the selecting means is provided. Selects and outputs the video signal received by one of the plurality of tuners, while the write pointer of the data storage means is
Writing of the video signal received by the other tuner of the plurality starts, and when a channel switching instruction signal is input as the external input signal, the read pointer of the data storage means starts reading, and The video signal received by the other tuner among the plurality of tuners recorded until the channel switching signal is input is reproduced at a higher speed than the writing speed of the writing pointer, and the selecting means includes the data storing means. Is selected and output.

The invention according to claim 6 is based on claim 1.
The television receiver according to any one of the preceding claims, further comprising a plurality of tuners, wherein the data storage means simultaneously records video signals received by a plurality of tuners specified by an external input signal among the plurality of tuners, and When a reproduction instruction signal is input as an input signal, the data storage means simultaneously reads a plurality of video signals recorded in the data recording means, and the selection means selects the plurality of simultaneously read video signals. When a channel determination instruction signal is input as an external input signal, the selecting means selects, from among the plurality of playback video signals, a playback signal received and recorded by a tuner designated by the channel determination signal. Only the video signal is selected and output.

The invention according to claim 7 is based on claim 1.
The television receiver according to any one of the preceding claims, further comprising a plurality of tuners, wherein the data storage means simultaneously records video signals received by a plurality of tuners specified by an external input signal among the plurality of tuners, and When a reproduction instruction signal is input as an input signal, the data storage means simultaneously reads a plurality of video signals recorded in the data recording means, and the selection means selects the plurality of simultaneously read video signals. And output it.

The invention according to claim 8 is the television receiver according to any one of claims 2, 4, 6, and 7, wherein when the reproduction instruction signal is input, the read pointer is set to the read pointer. Until the address of the read pointer matches the address of the write pointer, reading is performed at a higher speed than the write speed of the write pointer to reproduce the video signal at a high speed. When the addresses match, the selecting means selects the tuner. Is selected and output.

According to the ninth aspect of the present invention, there is provided the first aspect of the invention.
In the television receiver according to any one of the above items (1) to (8), the data storage section of the data storage means comprises a ring buffer next to the highest address and following the lowest address.

According to a tenth aspect of the present invention, in the recording / reproducing apparatus, there is provided a recording head for recording data on one recording surface of a recording disk, and a reproducing head for reproducing recorded data recorded on the recording surface. , A drive control means for individually driving the recording head and the reproducing head.

According to an eleventh aspect of the present invention, in the data recording method, the recording head is moved from a predetermined track of the recording disk having one surface as a recording surface toward an inner circumference or an outer circumference, so that the recording head is moved to a discrete track. Then, the recording head is moved in a direction opposite to the moving direction, and the data is recorded on the remaining tracks on which the recording was not performed.

According to a twelfth aspect of the present invention, in the data recording method, the first track from the predetermined track on the first recording surface of the recording disk having both sides as recording surfaces is directed inward or outward. And moving the second recording head,
Data is recorded on each track on the one recording surface using the first recording head, and then the first and second recording heads are moved in a direction opposite to the moving direction. The data is recorded on each track on the second recording surface of the recording disk by using the second recording head.

According to a thirteenth aspect of the present invention, there is provided a method of reproducing data recorded by the data recording method according to the eleventh aspect, wherein a predetermined track of a recording disc having one side as a recording surface is directed from an inner or outer circumference to a predetermined track. The reproducing head is moved toward, the data is reproduced for the intermittent tracks, and then the reproducing head is moved in the direction opposite to the moving direction, and the remaining tracks for which the reproduction is not performed are performed. The data is reproduced.

According to a fourteenth aspect of the present invention, there is provided a method of reproducing data recorded by the data recording method according to the eleventh aspect, wherein a predetermined track of a recording disk having one side as a recording surface is provided in a direction from an inner circumference to an outer circumference. Moving the reproducing head toward the target, reproducing data at intervals larger than the interval at the time of recording for the intermittent tracks, and thereafter moving the reproducing head in the direction opposite to the moving direction,
In the moving direction, the data is reproduced at intervals longer than the recording interval for the remaining discrete tracks that have not been reproduced.

According to a fifteenth aspect of the present invention, in the data reproducing method according to the thirteenth aspect, the reproducing is performed at a higher speed than the recording.

[0033] According to a sixteenth aspect of the present invention, in the method for reproducing data recorded by the data recording method according to the twelfth aspect, the predetermined data on the first recording surface of the recording disk having both surfaces as the recording surface is provided. The first and second reproducing heads are moved from the track toward the inner circumference or the outer circumference, and data is reproduced from each track on the one recording surface using the first reproducing head. Moving the first and second reproducing heads in a direction opposite to the moving direction, and moving the second reproducing head to each track on a second recording surface of the recording disk. This is used to reproduce data.

According to a seventeenth aspect of the present invention, there is provided a method for reproducing data recorded by the data recording method according to the twelfth aspect, wherein the predetermined data on the first recording surface of the recording disk having both surfaces as the recording surfaces is provided. The first and second reproducing heads are moved from the track toward the inner circumference or the outer circumference, and data is reproduced from the track on the one recording surface by using the first reproducing head. Thereafter, the first and second reproducing heads are moved in a direction opposite to the moving direction, and the second and the third reproducing heads are moved with respect to the discrete tracks on the second recording surface of the recording disc.
The data is reproduced by using the reproducing head of (1).

The invention according to claim 18 is the data reproduction method according to claim 16, wherein the reproduction is performed at a higher speed than the recording.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a main configuration of a video signal recording / reproducing device of a television receiver according to Embodiment 1 of the present invention, which can execute various recording / reproduction such as a playback function. In FIG. 1, reference numeral 1 denotes a tuner serving as a signal source, 2 denotes an information compression circuit that compresses a video signal output from the tuner 1, and 3 denotes a ring buffer that records a compressed video signal output from the information compression circuit 2. There is a configuration in which input data is written while the address is advanced by one for each input data write operation, and when the address goes around once, the input data is overwritten on old data. It is possible to accumulate past data for a time corresponding to the recording capacity from the time. Reference numeral 30 denotes a ring-shaped storage medium constituting the ring buffer 3, and 31 denotes a ring-shaped storage medium 3.
0 is a write pointer indicating the address currently being written, 32 is a read pointer indicating the address currently being read from the ring storage medium 30, and 33 is a final position indicating the last address of valid data already written to the ring storage medium 30. A pointer 4 is an information expansion circuit for expanding the compressed video signal read from the ring buffer 3, and 5 is one of a video signal output from the tuner 1 and a video signal output from the information expansion circuit 4. Is a CRT display device for displaying a video signal output from the selector 5, and 6 is a control circuit for controlling the operation of the ring buffer 3 and the selector 5 based on user inputs.

Hereinafter, an example of an operation mode realized by the configuration of the television receiver according to the first embodiment will be described.

Operation mode 1. The operation mode 1 is a so-called "interruption television". In this mode, after temporarily stopping the viewing of a television program, the part interrupted when the viewing is resumed can be watched. It is something that can catch up.

In the following description, the information compression circuit 2 and the information decompression circuit 4 are used as necessary according to the relationship between the data amount, the size of the recording medium, and the data transfer speed. Since the operation of the first embodiment is not important, the detailed operation of these portions will not be described.

In FIG. 1, the ring buffer 3 comprises:
It is realized by a readable / writable and relatively large-capacity memory such as a hard disk drive (hereinafter referred to as HDD) or the like. The address is circular, that is, the address is set so that the address following the highest address returns to the lowest address. A write pointer (WP) 31 having a ring-shaped recording medium 30 allocated in a ring shape and indicating a position on the ring-shaped recording medium 30 where current data is written.
And a read pointer (RP) 32 indicating a position from which data is currently being read, and a final position pointer (LP) 33 indicating a final position of valid data on the ring-shaped recording medium 30 as viewed from the read pointer 32. is there.

The final position indicated by the final position pointer 33 is actually the position at which writing to the ring-shaped recording medium 30 is started by the write pointer 31, and recording on the ring-shaped recording medium 30 by the write pointer 31 is performed. If less than one round of the recording medium 30, the final position pointer 3 on the side where the read pointer 32 is not located
The portion of the ring-shaped recording medium 30 between the position indicated by 3 and the position indicated by the write pointer 31 is an invalid data area. The portion of the ring-shaped recording medium 30 between the position and the position of the write pointer 31 becomes an effective data area.

Next, the operation mode 1 according to the first embodiment, that is, the operation of a so-called interrupted television, will be described with reference to FIG.

In FIG. 2A, Moni indicates the state of the television image, WP indicates the on / off state of the write pointer WP1 (31), and RP indicates the read pointer RP1.
The on and off states of (32) are shown, and a and b show the types of user input instructions.

.., Tm indicate data to be written to the ring buffer 3 at the times t1, t2,..., Tm, and tn (t1), tn + 1.
(t3), ..., tm-1 (tm-2), tm (tm) are times tn, tn + 1, ...
.., Tm indicate data read from the ring buffer 3, and the value in parentheses indicates the time at which the read data was written to the ring buffer 3.

In this reading, each frame may be read out by taking the same time as the writing time of one frame every one or more frames written as described above.
High-speed reproduction faster than the constant speed may be realized by skipping frames as needed. For example, when a high-speed reproduction of 1.33 times is realized, t1 (t1), t2 (t2), t3 (t3), t5 (t4), t6
(t5), t7 (t6), t9 (t7), t10 (t8), and t11 (t9) may be used. Also, the frames written and written one by one may be read at a faster speed than the writing of one frame. For example, in the case of reading at double speed, the read data is tn (t1), tn + 0.5 ( t2), ..., tm (tm-1), tm +
0.5 (tm).

When the viewer is watching the television broadcast normally, the selector 5 selects and outputs the video signal output from the tuner 1, and the normal video is
The image is displayed on the RT display device 10. And, when the viewer must temporarily leave the television receiver to cook or the like while watching the program,
The viewer inputs, as a user input, the interruption instruction input a of the interruption television function to the control circuit 6. Then, the control circuit 6 shown in FIG.
To start recording.

That is, the control circuit 6 controls the write pointer 3
1 and the video signal from the tuner 1, which has been compressed by the information compression circuit 2, from the tuner 1.
Recording is performed on the ring-shaped recording medium 30 through the write address 1 while the write address is advanced one by one. At this time, the control circuit 6 supplies the read pointer 32 with the address at the start of writing as the read address, thereby reading the video information written first as a still image. On the other hand, the selector 5 outputs the normal video signal from the tuner 1 in the same manner as before the input of the interruption instruction input a, and displays the normal video signal on the CRT display device 10 even if the viewer is absent. I do.

When the viewer returns to the television receiver after a certain period of time and watches the continuation of the program, the viewer inputs a restart instruction input b for the interrupted TV function to the control circuit 6. . Then, the control circuit 6 of FIG. 1 receives the user input b, continues the writing of the write pointer 31 being performed after the input of the interruption instruction input a, controls the read pointer 32, and Reading is performed while sequentially increasing the address from the address at the start of writing given to the read pointer 32 at the time of input, and while increasing the read speed of the read pointer 32 at a higher speed than the write speed of the write pointer 31. In this high-speed reading, as shown in FIG. 2A, reading may be performed by skipping the written frame as appropriate, or reading may be performed at a higher speed than at the time of writing.

On the other hand, the selector 5 is switched to output the output from the ring buffer 3 according to the control signal from the control circuit 6, so that the CRT display device 10 displays the high-speed reproduced video read by the read pointer 32. can get.

When the high-speed reproduction is performed as described above after the input of the restart input as the user input b, the high-speed reproduction video gradually catches up with the normal video, that is, the on-air broadcast video. When the high-speed playback video catches up with the video, that is, when the address of the read pointer 32 matches the address of the write pointer 31, the control circuit 6 suspends both the writing of the write pointer 31 and the reading by the read pointer 32, At the same time, the selector 5 is switched to a side for selecting and outputting the video signal from the tuner 1, whereby the CRT display device 10 displays a normal video.

Here, in the time T2 for viewing the high-speed playback video, the time T1 during the temporary suspension and the time T2 for the high-speed playback video
Since the video corresponding to the sum of T1 and T2 is viewed at the high-speed reproduction time T2, high-speed reproduction is performed at a speed of (T1 + T2) / T2 times.

In the operation mode 1, even when the viewing of the television broadcast is temporarily interrupted for cooking or the like, one program can be played from the beginning to the end by using the high-speed reproduction. Can be seen. In the operation mode 1, as shown in FIG. 2 (b), when the interruption input a is input, the selector 5 is switched to a side for outputting the output from the ring buffer 3, and the data t1 at that time is read by the read pointer 32. The still image is projected by playing over the interruption period,
In response to the user input b, the reading may be performed while the reading speed of the reading pointer 32 is being made faster than the writing speed of the writing pointer 31. In this high-speed reading, as shown in FIG. 2 (b), reading may be performed by skipping the written frame as appropriate, or reading may be performed at a speed higher than that at the time of writing one frame at a time.

When reading is performed every other frame, the read data is tn (t2), tn + 1 (t4),..., Tm-1 (tm-
2), tm (tm). Also, this high-speed reproduction may be realized by reading at a higher speed than at the time of writing,
When reading at double speed, the read data is tn
(t2), tn + 0.5 (t3), ..., tm (tm-1), tm + 0.5 (tm). Note that the read data during the period for reading the still image is t2 (t1), t3 (t1),..., Tn-1 (t1).

By doing so, the video when the interruption input a is input can be displayed as a still image on the monitor as it is, and it is as if the reproduction was started (when the restart input b was input). Playback can be performed as if releasing the pause, and smooth playback can be performed without any unnaturalness during playback. In other words, when the video is not visible during the pause, only the sound comes into the ear, and when the video is viewed properly after resuming, the synopsis is roughly understood and it is boring. Thus, it is possible to avoid a problem that the screen is returned to the previous screen and is unnatural.

As described above, according to the operation mode 1, the ring buffer 3 is used to record from the video part which could not be watched because of the temporary interruption or the absence of the viewer in the middle of the program which had been watched. Is started, the read pointer 32 is read at a speed higher than the write pointer 31 at the time of reproduction, and high-speed reproduction is performed.
Alternatively, the user can watch the desired program including the video portion that was absent from the beginning to the end.

In the operation mode 1, the read speed of the read pointer 32 is set to be higher than the write speed of the write pointer 31 when the temporarily interrupted video is reproduced. May be played back at the same speed.

If there is a program B to be watched after the program A to be watched while the program is temporarily interrupted, the program shown in FIG.
As shown in (a), when the restart input b is input, the time T from the input of the interrupt input a to the end of the regulation of the program A is determined.
3 and the time T4 from the input of the restart input b to the end of the specified time of the program A, the speed of the high-speed reproduction, that is, the read speed of the read pointer 32 is calculated by the equation T3 / T4, or FIG. As shown in (b), the equation (T3 −
t1) / T4 calculates this reading speed, and program A
Can be provided with a so-called automatic catch-up calculation function in which the high-speed reproduction of the program is ended by the broadcast start time of the program B, that is, the specified end time of the program A. In order to realize this function, the control circuit 6 may be provided with the end time of the regulation of the program A in advance.

Operation mode 2. The operation mode 2 is obtained by adding a plurality of interruption functions to the operation mode 1. That is, when the viewer is cooking while watching the television broadcast or the like, it is often necessary to interrupt the viewing of the television receiver and work on the cooking. When a plurality of interruptions in the operation mode 1 are performed, the temporarily interrupted programs are recorded at the time of the interruption, and the interrupted program portions are collectively viewed within the broadcasting time. It is.

Referring to FIG. 4, the operation of the operation mode 2 is described below. First, the operation of the control circuit 6 in the television receiver having the same configuration as that of the operation mode 1 will be described. Set the multiple interruption mode. Thereafter, during the viewing of program A, when the viewer inputs an interruption instruction input to the control circuit 6 as the first user input a1, the ring buffer 3 causes the write pointer WP to start writing from that point. The temporarily interrupted program portion, that is, the video signal of the normal video I1 shown in FIG. t1, t2, ..., tn-1 are this time
.., tn−1 indicates data to be written to the ring buffer 3. At this time, in the CRT display device 10, as in the operation mode 1,
Even if a viewer is not present, a normal video signal is displayed as it is.

Then, after a certain period of time, when the viewer returns to the television receiver again and inputs the interruption release instruction input to the control circuit 6 as the user input b1 in order to watch the continuation of the program, the ring buffer 3 Then, the writing of data by the writing pointer WP is stopped, and thereafter, the viewer simply watches the normal video. Then, when the viewer wants to temporarily suspend the viewing again, he or she inputs a re-suspension instruction input as the user input a2, and by the same operation as described above, the suspended program portion, that is, FIG. 4 is recorded in the ring buffer 3 following the recording portion of the normal video temporarily interrupted I1 in FIG. tn, tn + 1, ...
.., Tm-1 indicate data to be written to the ring buffer 3 at the times tn, tn + 1,..., Tm-1.

Then, when the viewer returns to the front of the television receiver again and again inputs the interruption release instruction input to the control circuit 6 as the user input b2, the writing by the ring buffer 3 is stopped in the same manner as described above. , It simply becomes a state of watching a normal video.

Then, at a suitable time thereafter, when the user wants to see through the video part which could not be watched during the temporary interruption and the video up to the end of the program thereafter, he inputs a preview instruction as user input c. In response to an instruction from the control circuit 6 shown in FIG.
1, the normal video currently being broadcast from that point on is continuously recorded, and at the same time, the read pointer 32 is used to read out from the ring buffer 3 at a high speed. High-speed reproduction is performed, and subsequently, the normal video I3 recorded after the input of the see-through instruction c is also reproduced at high speed, and this high-speed reproduction output is output to the CRT display device 10 via the selector 5. At the same time, when the high-speed reproduction catches up with the normal video currently being broadcast, the selector 5 is switched to display the normal video from the tuner 1 on the CRT display device 10, as in the operation mode 1. become.
tm, tm + 1, ..., to-1 are the times tm, tm + 1, ...,
This indicates data to be written to the ring buffer 3 at to-1 and includes tm (t1), tm + 1 (t4),..., tα
-1 (tn-4) and tα (tn-1) are the times tm, tm + 1,.
, Tα-1 and tα indicate the data I1 read from the ring buffer 3, and tα + 1 (tn), tα
+2 (tn + 3), ..., tβ-1 (tm-4), tβ (tm-1) is the time t
.., tβ-1 and tβ indicate the data I2 read from the ring buffer 3, and tβ + 1 (tm), tβ + 2 (tm + 3),.・ 、 To-2 (to-4) 、
to-1 (to-1) is the time tβ + 1, tβ + 2, ..., to-2, to-1
Data I3 read from the ring buffer 3 at
The parentheses indicate the time at which the read data was written to the ring buffer 3.

In this reading, the frames written as described above may be skipped as appropriate so as to achieve high-speed reproduction at a speed of two frames or less, or the frames written and written one by one may be read. High-speed reading may be performed at a speed three times or less as fast as writing. For example, when reading at 3 × speed, the data I read from the ring buffer 3
1 is tm (t1), tm + 1/3 (t2), ..., tα (tn-2), tα + 1
/ 3 (tn-1), and the data I2 is tα + 2/3 (tn), tα + 1 (tn
n + 1),..., tβ (tm-2), tβ + 1/3 (tm-1), and data I3 is tβ + 2/3 (tm), tβ + 1 (tm + 1),.・ ・ 、 To (to
-2), to + 1/3 (to-1).

At this time, the time T during the first temporary suspension
1, the time T2 during the second suspension, the images I1 and I2 reproduced at high speed, and the high-speed image I
1, to reproduce I2, to reproduce the normal video broadcast during this period to catch up with the original broadcast
The relationship between the series of high-speed reproduction periods T3 and the speed (α times) of this high-speed reproduction is T1 + T2 + T3 = αT3, and the high-speed reproduction is α = (T1 + T2 + T3) / T3.
It should be done at a speed of. Accordingly, the high-speed playback video I1, I2 and the subsequent high-speed playback of the normal video I3
Are T1 / α, T2 / α, and T3 / α, respectively.

In the operation mode 2, as shown in FIG. 5, when the interruption input a1 is inputted, the selector 5 is switched to the side for outputting the output from the ring buffer 3,
The write data t1 at that time is reproduced in a stationary manner by the read pointer 32 during the interruption period T1, and this series of processing is similarly performed when the re-interruption input a2 is input. The reading may be performed while the reading speed of the writing pointer 31 is made faster than the writing speed of the writing pointer 31.
In this high-speed readout, as shown in FIG. 5, reading may be performed by skipping frames as appropriate so that high-speed reproduction is performed at intervals of two frames or less, or three times faster or less at a time for each frame. Reading may be performed at a high reading speed.

In this case, the write data in the period T1 is t1, t2,..., Tn-1, the write data in the period T2 is tm, tm + 1,. Assuming that tp, tp + 1,..., tq−1, the read data in the period T1 is t2 (t1), t3 (t1),
, Tn-1 (t1), the read data in the period T2 is tm + 2 (tm), tm + 3 (tm), ..., to-1 (tm).

The read data in the period T3 may be read by skipping frames as appropriate so that high-speed reproduction is performed at intervals of two frames or less, and when reading is performed at intervals of two frames, the high-speed reproduction data I1 is read. Data is
tp (t2), tp + 1 (t5), ..., tγ-2 (tn-4), tγ-1 (tn-
1), and the read data of the high-speed reproduction data I2 is tγ (t
m + 1), tγ + 1 (tm + 4), ..., tδ-2 (to-4), tδ-1 (t
o-1), and the read data of the high-speed reproduction data I3 is tδ
(tp + 1), tδ + 1 (tp + 4), ..., tq-2 (tq-4), tq-1
(tq-1).

By the way, the read data in this period T3 may be such that the frames written and written one frame at a time are read at a speed three times or less as fast as the writing of one frame. The read data of the reproduction data I1 is tp (t2), tp + 1/3 (t3),.
・, Tγ-4 / 3 (tn-2), tγ-1 (tn-1), and the read data of the high-speed reproduction data I2 is tγ (tm + 1), tγ + 1/3 (tm +
2),..., Tδ-4 / 3 (to-2), tδ-1 (to-1), and the read data of the high-speed reproduction data I3 is tδ (tp + 1), tδ + 1
/ 3 (tp + 2), ..., tq-4 / 3 (tq-2), tq-1 (tq-1).

By doing so, the video when the interruption input a is input can be displayed as a still image on the monitor as it is, and the video of a plurality of interruption periods can be collected at a high speed later. You can watch it.

As described above, according to the operation mode 2, even when a plurality of interruptions are performed, it is possible to pass through the portions that could not be seen due to the plurality of interruptions together with the rest of the program near the end time of the program. You can do it. In addition, see-through instruction c
After the end of the program, it is also possible to watch only the video of the portion interrupted a plurality of times during the broadcast of the program after the end of the program.

Embodiment 2 FIG. 6 is a block diagram illustrating a main configuration of a video signal recording unit of a television receiver according to Embodiment 2 of the present invention. The second embodiment is different from the first embodiment shown in FIG. 1 in that a plurality of pairs of tuners and ring buffers are provided, and the output of each ring buffer is selected and output using a selector 7. is there.

That is, in FIG. 6, reference numerals 1a to 1n denote a plurality of tuners serving as signal sources, 2a to 2n denote information compression circuits for compressing video signals output from the tuners 1a to 1n, and 3a to 3n denote a plurality of information compression circuits. Information compression circuit 2a
To 2n, each of which stores a compressed video signal output from each of the ring buffers 3a to 3n.
3n is a signal source selector for selecting a necessary one of the compressed video signals read out from 3n and outputting it. Further, the selector 5 switches and outputs the output of the signal source selector 7 and the output of the main tuner 8. As shown in FIG. 7, the main tuner 8 is connected to another tuner 1a.
1 to 1n, the main tuner may be omitted.
The output of the tuner that receives the channel to be received by the main tuner 8 among the channels n can be realized by, for example, inputting the output of the tuner 1n to the selector 5.

Operation mode 3. Hereinafter, an operation in operation mode 3 realized using the configuration of the second embodiment of the present invention will be described. The operation mode 3 is what is called “elimination of double of broadcast time”.
If the broadcast of the program was extended, the program A
If the program D that the user wants to watch next is on another channel and the broadcast time of the two programs overlaps due to the extension of the broadcast, both programs A and D can be watched continuously. It is made possible.

As shown in FIG. 8, when a viewer wants to watch program A on channel CH2 after broadcasting program A to be watched on channel CH1, the broadcast of program A watched on channel CH1 is extended. When the extension instruction is input as the user input a, the main tuner 8
Alternatively, the tuner 1n continues to receive the program A on the channel CH1, and this is selected and output by the selector 5, and
The video display of the program A is continued on the RT display device 10. On the other hand, when the input a of the extension instruction is input to the control circuit 6, the tuner 1 a
Receives the program D of the channel CH2 and records the program D of the channel CH2 by the ring buffer 3a by the same operation as described above. , tm are the ring buffers 3a at the times t1, t2,.
Shows the data recorded.

Next, when the extension broadcast of the program A on the channel CH1 is completed, the viewer inputs an extension end instruction as a user input b, and the ring buffer 3a is operated similarly to the operation in the first embodiment. Performs high-speed reproduction of the program D of the channel CH2 received and recorded by the tuner 1a after the input of the extension instruction input a.

When this high-speed reproduction is realized by reproduction every other frame, the reproduction data is ts (t1), ts + 1 (t3),.
tu-1 (tm-2) and tu (tm), which are the times ts, ts + 1,.
.. Indicates that the data is playback data in tu-1, tu.
When high-speed playback is realized at 2 × speed, the playback data is ts (t1), ts + 0.5 (t2),..., Tu (tm−1), tu + 0.5 (t
m), and these are times ts, ts + 0.5, ..., tu, tu +
Indicates playback data at 0.5. Note that the time in parentheses indicates the time at which the data was recorded.

At the time of the high-speed reproduction, the selector 7 selects and outputs the high-speed reproduction video of the program D output from the ring buffer 3a according to the instruction of the control circuit 6, and at the time of inputting the extension end instruction b. The selector 5 switches from the side outputting the output of the tuner 8 or the tuner 1n to the side outputting the outputs of the ring buffers 3a to 3n, whereby the high-speed playback video of the program D is displayed and output on the CRT display device 10. You. Then, similarly to the operation in the operation mode 1, after the high-speed reproduction of the program D catches up with the normal broadcast of the program D, the program D
Is broadcasted. By the above operation, CRT
On the monitor, the video of the program A and its extended part are displayed, followed by the high-speed playback video from the first part of the program D, followed by the normal video of the program D. Is displayed without interruption.

As described above, according to the operation mode 3, when the program A currently being broadcast is extended, the ring buffer 3 a
When the extended broadcast of the program A is completed, the program D recorded as the back program is reproduced at a high speed, and when catching up with the normal image of the program D, the normal image is displayed. As a result, the back program D whose broadcast time overlaps with the extended broadcast of program A,
After you have watched everything, you can look through it from start to finish.

In the operation mode 3, when reproducing the program D whose broadcast time overlaps with the extension of the broadcast of the program A,
The high-speed reproduction is performed so as to catch up with the normal broadcast video. However, the reproduction may be performed at the same speed as the normal broadcast video, especially when there is no plan to watch another program continuously.

When there is a program that the user wants to watch continuously after the end of the program D, the high-speed reproduction of the program D is completed before the end of the broadcast of the program D.
The high-speed reproduction of the program D can be adjusted in the same manner as in the first embodiment so that the high-speed reproduction of the program D catches up with the normal broadcasting of the program D in time.

Further, in the operation mode, 1a to 1
Although only one or two of the tuners up to n are used, it is also possible to use the remaining tuners to eliminate duplication of broadcast time for more channels. Hereinafter, this mode will be described as operation mode 4.

Operation mode 4. Next, an operation in operation mode 4 realized using the configuration of the second embodiment will be described. This operation mode 4 is a so-called “zapping (zappi
ng) Connect, for example, Channel C
Program A on three channels H1, CH2 and CH3,
When it is desired to watch all of B and C, all of them can be viewed using the high-speed reproduction described above. In this case, if you want to watch all three programs because you can skip each program, even with the current television receiver, you can use the time of commercials to change channels one after another. However, in the operation mode 4, each of the programs A, B, and C can be viewed from the beginning to the end.

That is, as shown in FIG. 9, three programs A, B, and C are now assigned to channel CH1 and channel CH.
2. It is assumed that the broadcast is simultaneously performed on channel CH3. In the drawing, a hatched portion indicates a time during which the corresponding channel is viewed, and a cross-marked portion indicates a time during which the corresponding channel cannot be viewed. Here, taking the channel CH1 as an example, the other two channels CH2 and CH3 cannot be normally viewed in the time period from t1 to t2 and from t4 to t5 when the channel CH1 is viewed.

As for the channel CH2, as in the case of the channel CH1, the other two channels CH3 and CH1 cannot be viewed in the time period from t2 to t3 and from t5 to t6 when the channel CH2 is viewed.
Regarding the channel CH3, the other two channels CH1 and CH2 cannot be viewed in the time period from t3 to t4 and from t6 to t7 when the channel CH3 is being viewed.

Then, after designating three channels CH1, CH2, and CH3 for which zapping is to be performed, and inputting a zapping command as a user input c, the tuners 1a, 1b, 1 are controlled by the control circuit 6 shown in FIG.
c receives the video signals of the respective channels CH1, CH2 and CH3, and as shown in FIG. 10, at time t11, the write pointer W of each of the ring buffers 3a to 3c.
Writing of P1 to WP3 is started, and programs A, B, and C of each channel are recorded. t11, t111,…, t11n, t
12, t121,…, t12n,…, t151,…, t15n, t16, t161,…, t16
n, ... are times t11, t111,…, t11n, t12, t121,…, t12n,…, t
, T15n, t16, t161,..., T16n,..., Indicate the data written to each of the ring buffers 3a to 3c.

On the other hand, the tuner 8 or the tuner 1n
As shown in FIG. 11, the video signal of the channel CH1 is received by the input of the first channel CH1 at the time of inputting the zapping instruction at the time t11, and this is selected by the selector 5 and displayed on the CRT display device 10. The program A of the channel CH1 is displayed.

Next, at time t12, when a channel switching instruction is input as a user input d, the tuner 8 or the tuner 1n operates at the time of the zapping instruction.
The channel is switched to the second channel CH2, and the ring buffer 3b is broadcast and recorded from when the zapping command c is input to when the channel switching signal d is input by causing the read pointer RP2 to perform high-speed reading. By reproducing the program B every two or more frames, high-speed reproduction is performed. t1
2 (t11), t121 (t113),..., T12n-1 (t11n-3), t12n (t11n) are the ring buffers 3 at times t12, t121,.
This data is reproduced at high speed by being read out every other frame from b, and the value in parentheses indicates the point at which this data was written. It is to be noted that this high-speed reproduction can be performed by reproducing at a speed of 3 times or more. In the case of 3 times speed, the read data is t12 (t11), t12 + 1/3 (t111),..., T12n-1 /
3 (t11n-1) and t12n (t11n).

On the other hand, the selector 5 is switched to the side for outputting the output from the ring buffer in accordance with the channel switching instruction d, whereby the high-speed reproduction video of the program B is displayed and output on the CRT display device 10. At time t13, when the high-speed reproduction of the program B catches up with the normal broadcast of the program B, the reading of the read pointer RP2 is stopped, and no video output is output from the ring buffer 3b. Is switched to the side that outputs the output of the tuner 8, and the normal broadcast of the program B from the tuner 8 or the tuner 1n is switched to C.
It is displayed on the RT display device 10.

Subsequently, at time t14, the user input e
When the channel switching instruction is input, the tuner 8 or the tuner 1n switches the channel to the third channel CH3 at the time of the zapping instruction, and the ring buffer 3c sets the read pointer RP3 at every other frame. The high-speed reading of the program C broadcast and recorded from the time when the zapping command c is input at time t11 to the time when the channel switching signal e is input at time t14 is performed. Do. t14 (t11), t141 (t1
13), ..., t14n-1 (t14n-3), t14n (t14n) are time t14, t141,
.., T14n-1 and t14n are data reproduced at high speed by being read out from the ring buffer 3c every two frames, and the values in parentheses indicate the time at which the data was written. It is to be noted that this high-speed reproduction can be performed by reproducing at a speed of 3 × or more, and the read data in the case of the 3 × speed is t14 (t11), t14 + 1/3 (t111),..., T14n−1 / 3 (t14n-1),
t14n (t14n).

On the other hand, the selector 5 is switched to the side for outputting the output from the ring buffer 3c in response to the channel switching instruction e at time t14, whereby the high-speed reproduction video of the program C is displayed on the CRT display device 10. Is output. At time t15, when the high-speed reproduction of the program C catches up with the normal broadcast of the program C, the reading of the read pointer RP3 is stopped, and no video output is output from the ring buffer 3c. Is switched to the output side of the tuner 8 or the tuner 1n, and the normal broadcast of the program C from the tuner 8 or the tuner 1n is displayed on the CRT display device.

Next, at time t16, when a channel switching signal is input as the user input f, the tuner 8 or the tuner 1n returns to the 3 at the time of the zapping instruction.
The channel is switched to the third channel CH3, and the ring buffer 3a
Controls the read pointer RP1 to reproduce the video signal of the program A recorded from the time t12 at the time when the channel switching instruction of the user input d is given to the ring buffer 3a at a high speed every two frames or more. t16 (t12), t161 (t123),
…, T16n-1 (t16n-3) and t16n (t16n) are times t16, t161,…, t16
Data that is reproduced at high speed by being read out from the ring buffer 3a every two frames at n-1 and t16n,
The value in parentheses indicates the point at which this data was written. This high-speed reproduction can be performed by reproducing at a speed of 3 × or higher.
t16 (t12), t16 + 1/3 (t121),…, t16n-1 / 3 (t16n-1), t16n (t
16n).

On the other hand, the selector 5 is switched to the side for outputting the output from the ring buffer 3a in accordance with the channel switching instruction f, whereby the high-speed reproduction video of the program A is displayed and output on the CRT display device 10. . Time t1
7, when the high-speed reproduction of the program A catches up with the normal broadcast of the program A, the reading of the read pointer RP1 is stopped, and no video output is output from the ring buffer 3a. The output of the tuner 8 is switched to the output side, and the normal broadcast of the program A from the tuner 8 is transmitted to the CRT display device 10.
Will be displayed. Thereafter, the same operation as the operation for displaying the second program A is repeated.

As described above, according to the present operation mode 4, programs A, B, and C being broadcast in the same time zone are simultaneously recorded using a plurality of tuners and a ring buffer.
When the channel is switched from the program A to the program B, the channel CH2 recorded at the time of watching the program A
After the high-speed reproduction of the program B, the normal broadcast of the program B is displayed. Similarly, when the channel is switched to the program C, the program B is recorded at the time of watching the programs A and B. After performing the high-speed reproduction of the program C on the channel CH3, the normal broadcast of the program C is displayed. Similarly, the high-speed reproduction display and the normal broadcast display are repeated each time the channel is switched. For a plurality of programs broadcast in a band, the contents of all programs can be viewed from the beginning to the end while changing channels one after another. In the operation mode 4, zapping of three channels has been described as an example, but zapping of n channels (n is an integer of 2 or more) may be used.
This can be realized by performing double-speed playback.

Further, by incorporating a function of automatically recognizing a program portion that the viewer does not want such as a commercial broadcast, unnecessary portions can be prevented from being recorded and displayed. For example, when zapping three channels, the configuration described above requires a high-speed reproduction speed of three times or more. In the configuration omitting the commercial part, the high-speed reproduction speed of three times or more is required. Thus, zapping of three channels can be realized.

Third Embodiment FIGS. 12 and 13 are block diagrams showing a main configuration of a video signal recording section of a television receiver according to a third embodiment of the present invention. In the third embodiment, signal processing is performed on the output of the selector 7 in the second embodiment shown in FIGS. 6 and 7 so that multi-screen display is possible. That is, in FIGS. 12 and 13, reference numeral 9 denotes a signal processing circuit, which processes the output of the selector 7 so as to enable multi-window display and outputs it to the CRT. Hereinafter, an operation in operation mode 5 realized using the configuration of the third embodiment of the present invention will be described.

Operation mode 5. This operation mode 5 is what is called a “fast-forward index”, in which a plurality of programs broadcast before the return time are index-reproduced and watched, and after watching these, the program to be watched is determined. It is something that can be done. More specifically, a program of a plurality of channels specified by a viewer is recorded in a plurality of ring buffers in advance, and the program recorded above is recorded on a multi-screen when a television receiver is switched on at an arbitrary time. , A plurality of programs are displayed at the same time, a program that looks interesting is searched from among them, and one of the programs can be viewed, or a plurality of programs can be viewed on a multi-screen.

In the apparatus according to the third embodiment, FIG.
2, the selector 7 shown in FIG.
To 3n can be selectively output from a plurality of desired channels, and the signal processing circuit 9
These selection outputs are converted into a multi-screen to form a CRT display device 1
0 can be displayed on a multi-screen.

Next, the operation will be described. First, if the viewer sets a plurality of channels, in this case, five channels, in order to select a program, as shown in FIG. 14, a predetermined time such as two hours before power-on is set. As an upper limit, the five programs A to E broadcast on the five channels CH1 to CH5 are tuners 1a to 1a, respectively.
1e, the information is compressed by the information compression circuits 2a to 2e, and recorded by the ring buffers 3a to 3e. tx1,…, txn, ty1,…, tyn, tz1,…, tzn
At time tx1, ..., txn, ty1, ..., tyn, tz1, ..., tzn,
The data written in each of the ring buffers 3a to 3e is shown.

When a viewer inputs a playback signal as a user input g when returning home, at time ty1 when the user input g is received, the control circuit 6 of FIG. While the writing by the write pointers WP1 to WP5 is continued, the read pointers RP1 to RP5 start reading and reproducing the image signals of the programs A to E from the write start addresses of the write pointers WP1 to WP5. ty1 (tx1),
.., Tyn (txn) indicate data read from the respective ring buffers 3a to 3e at times ty1,..., Tyn, and parentheses indicate the time at which the data was written.

At the same time as starting to read and reproduce the image signals of the programs A to E, the selector 7
The selector 5 selectively outputs the outputs of the three ring buffers 3a to 3e. The selector 5 outputs the outputs of the selector 7, and outputs these outputs to a plurality of screens by the signal processing circuit 9 at the subsequent stage of the selector 7. By performing signal processing so as to obtain a multi-screen display divided into a plurality of images and outputting the signals to the CRT display device 10, multi-screen displays of programs A to E are performed.

Looking at this multi-screen display, the viewer selects one of the desired programs A to E, here program A, and inputs a channel determination signal as user input h. . In response to the user input h at time tz1, the control circuit 6 in FIG. 12 stops reading the read pointers RP2 to RP5 that are playing other programs B to E, and the selector 7 A
Only the output of the ring buffer 3a that reproduces the video is selected and output. tz1 (ty1),…, tzn (tyn) is the time tz1,
.., Tzn indicate the data read from the ring buffer 3a, and the parentheses indicate the time at which the data was written.

Here, the ring buffer 3a can reproduce and output the video at the same speed as that of the ordinary broadcast by setting the speed at which the address of the read pointer RP is advanced to the speed at the time of writing. In the signal processing circuit 9 at the subsequent stage, the multi-screen display is canceled, and only the selected program A, which is the output from the ring buffer 3a, is displayed on one screen.
Will be displayed. At this time, in order to reduce the power consumption, the writing of the write pointers WP2 to WP5 of the ring buffer that has recorded the unselected program may be stopped.

As shown in FIG. 15, at time tz1, after a channel decision signal is input as user input h and program A is selected, the data in ring buffer 3a is reproduced at a speed higher than the constant speed. By doing so, the high-speed reproduction can be performed, and when the content has caught up with the content of the program A being broadcast, the selector 5 can be switched to display the signal of the main tuner 8.

Tz1 (ty1), tz2 (ty3), ..., tzm-1 (tym-2), tzm
(tym) indicates read data at times tz1, tz2,..., tzm-1, tzm when this high-speed playback is realized by playback every other frame, and tz1 (ty1), tz1.5 (ty2) ,…, Tzm-0.5 (tym-1), tz
m (tym) is the time tz for realizing this high-speed playback at double speed.
.., Tzm-0.5, tzm.

Then, at time tzm, when the high-speed reproduction catches up with the broadcast content at that time, the control circuit 6 stops reading data from the ring buffer 3a and moves the selector 5 to the main tuner 8 or the tuner 1n. By switching, the signal is displayed on the CRT display device 10.
As described above, according to the operation mode 5, a plurality of programs on a plurality of channels are recorded in advance before a predetermined time, and the plurality of recorded programs are displayed on a multi-screen when the television is switched on, so that a program which is likely to be interesting is displayed. After selecting, one of them is displayed in full screen, or a plurality of programs are displayed in multi-screen.
Even when returning home a little later than expected, it is possible to select a desired program from the end of the broadcast of a plurality of programs and pass it through from the beginning to the end. In the operation mode 5, the case of five channels has been described as an example. However, it goes without saying that all the tuners 1a to 1n may be used.

Operation mode 6. In this operation mode 6, a plurality of programs broadcast before the time of returning home can be reproduced and viewed at once, which is what is called "full-time multi-screen playback". That is, in this operation mode 6, when it is desired to play back and view all of the plurality of programs A to E specified by the viewer,
As shown in FIG. 16, before the power is turned on, the ring buffers 3a-3
In n, the writing pointers WP1 to WP5 are turned on (writing is started) and the programs A to E are written.
tx1, tx2,…, txn-1, txn, ty1, ty2,…, tyn-1, tyn, tz1,
, Tzn-1, tzn indicate write data at times tx1, tx2, ..., tzn-1, tzn.

Next, at time ty1, the user input g
When a playback signal is input, the read pointers RP1 to RP5 are turned on and all programs can be displayed and viewed on a multi-screen. ty1 (tx1), ty2 (tx2),
.., Tyn-1 (txn-1), tyn (txn), tz1 (ty1),... Indicate data read from the respective ring buffers 3a to 3e at this time, and ty1, ty2,. , tz1,... indicate the read time, and parentheses indicate the time at which the data was written.

At this time, as shown in FIG. 17, of course, high-speed reproduction can be performed as shown in FIG. 17. When high-speed reproduction catches up with normal broadcasting, normal broadcasting can be watched in real time. Can be. That is,
At time ty1, after the playback signal is input as the user input g, the data in the ring buffers 3a to 3e is reproduced at a speed higher than the constant speed to perform the high-speed reproduction. ty1 (tx1), ty2 (tx3),…, tyα-1 (ty α-2), ty
α (ty α) is read data when the read is performed every other frame, and this read is performed at times ty1, ty2,.
This is performed for tyα-1, tyα, and the value in parentheses indicates the time at which the data was written. Then, the read data after the completion of the high-speed reading is tyα + 1 (ty α + 1), tyα + 2
(ty α + 2),..., and the data currently written is immediately read from the ring buffer.

When performing this high-speed reproduction at double speed, the read data is ty1 (tx1), ty1.5 (tx2),.
(ty α-1) and ty α (ty α), and the read data after this high-speed read is ty α + 1 (t
y α + 1), ty α + 2 (ty α + 2),.

As described above, according to the present operation mode 6, programs of a plurality of channels are recorded in advance before a predetermined time, and the recorded programs are reproduced at high speed on a multi-screen when the television is switched on. Accordingly, a plurality of desired programs can be played back in a full-time multi-screen, and a plurality of desired programs can be watched at once in a short time.

In the second and third embodiments,
It is also possible to mount an HDD having a storage capacity of several hundred giga. In this case, all the television programs are always recorded on a monthly basis, and the operations of the second and third embodiments (mainly recording and reproduction) are performed. Can be performed on a one-month TV program. Further, in each of the above embodiments, an icon such as a clock or a message indicating that reproduction is to be displayed may be displayed on the screen being reproduced and displayed.

In the first, second, and third embodiments, when performing high-speed reproduction, the read pointer does not enter the invalid data area of the ring buffer.
It is necessary to control so that the address of the read pointer does not overtake the address of the write pointer. Also,
In each of the above embodiments, it is also possible to perform rewind reproduction by moving the read pointer in a direction opposite to the recording direction of the write pointer during reproduction.

The ring buffer used in the first, second, and third embodiments is not limited to an HDD, but may be any other recording medium such as an optical disk as long as the memory can freely set a read address in block units. If the read pointer is not moved in the opposite direction to the write pointer, a memory such as a FIFO (First In First Out) can be used. Further, as a method of information compression used in the first, second, and third embodiments, a method of compressing a video signal for each frame is most suitable, but JPEG, MPEG, and other encoding methods are used. Is also possible.

Embodiment 4 By the way, in order to realize the television receiver as shown in the above-described first to third embodiments, a ring buffer as a recording / reproducing device is provided with a random access using a disk medium such as a hard disk drive device. In the case of using a simple storage device, it is necessary to reduce the operation noise, dropped frames caused by disk access, and unnecessary disk access.

FIGS. 18 and 19 are diagrams showing a configuration of a recording / reproducing apparatus with a playback function according to a fourth embodiment of the present invention which can solve such a problem. FIG. FIG. 19 shows an example of performing double-sided recording on one disk.

Hereinafter, the configuration of the fourth embodiment will be described mainly with reference to FIG. That is, as shown in FIGS. 18 and 19, reference numeral 1 denotes a tuner as means for receiving a broadcast signal, information compression circuit 2 compresses a broadcast signal from tuner 1, and recording circuit 3 compresses a broadcast signal. This is a circuit for recording the compressed signal.

The hard disk drive 20 is a device for recording and reproducing a compressed signal. When recording proceeds to the highest address, the recording is returned to the next lowest address and recording is performed. In FIG. 18, the magnetic disk 14, the spindle motor 15, the rotating shaft 16, the first recording head 17a, the recording head driving mechanism 21, the first reproducing head 19a, It comprises a reproducing head drive mechanism section 22 and a control section 23. Also,
In FIG. 19, the second recording head 17
b and a second reproducing head 19b.

The magnetic disk 14 is a recording medium for recording a compression signal, and the spindle motor 15 is a motor having a rotating shaft 16 for rotating the magnetic disk 14 at a constant speed. The first recording head 17a and the second recording head 17b are magnetic heads for writing an output signal from the recording circuit 13 to the magnetic disk 14, and the recording head driving mechanism 21 is for moving the first recording head 17a. Means. When the second recording head 17b is also provided, the second recording head 17b moves integrally with the first recording head 17a. The first recording head 17a performs recording on the upper surface side of the magnetic disk 14, and the second recording head 17a.
A magnetic head b performs recording on the lower surface side of the magnetic disk 14. The first reproducing head 19a and the second reproducing head 19b are magnetic heads for reading data written on the magnetic disk 14, and the reproducing head driving mechanism 2
Reference numeral 2 denotes means for moving the first reproducing head 19a. When the second reproducing head 19b is also provided, the second reproducing head 19b moves integrally with the first reproducing head 19a. The first read head 19a is connected to the magnetic disk 14
The second reproducing head 19b is a magnetic head for reproducing the lower surface side of the magnetic disk 14.

The control unit 23 controls the rotation of the spindle motor 15 and the position control of the first recording head 17a and the second recording head 17b and the position control of the first reproducing head 19a and the second reproducing head 19b. For outputting a control signal to the above sections. Here, the control unit 23 includes a drive control unit according to the claims of the present invention, and includes a first recording head 17a, a second recording head 17b, a first reproducing head 19a, and a second reproducing head. 19b is configured to be independently movable by each of the drive mechanism units 21 and 22 based on a control signal from the control unit 23.

The reproduction circuit 24 is a circuit for reproducing the signal read by the reproduction head 19, the information decompression circuit 4 is a circuit for decompressing the reproduced signal, and the display 10 converts the decompressed signal. This is a means for displaying.

FIGS. 20 and 21 are perspective views schematically showing mainly the magnetic disk 14 of the recording / reproducing apparatus with the playback function according to the fourth embodiment. As shown in FIGS. 20 and 21, the first recording head 17a or the second recording head 17b and the first reproducing head 19a or the second reproducing head 19b are located on both sides of the center point of the magnetic disk 14. It is installed in. The recording head 17a and the recording head 17b can be moved randomly between the inner peripheral portion and the outer peripheral portion of the magnetic disk 14 by the recording head driving mechanism 21 as shown by an arrow A in the figure. Further, the print head position control unit 23 b
This is a means for outputting a control signal for controlling the positions of the recording heads 17a and 17b. The reproducing head 1
9a and 19b are the reproduction head drive mechanism 22
Thereby, as shown by the arrow B in the figure, the magnetic disk 14 can be moved at random between the inner peripheral portion and the outer peripheral portion. The reproduction head position control unit 23c is
Is a means for outputting a control signal for controlling the position of the reproducing head 19a or 19b. The control unit 23 includes a recording head position control unit 23b, a reproduction head position control unit 23c, and a motor control unit 2 that controls driving of the spindle motor 15 so that the rotation speed of the spindle motor 15 is constant.
3a. Incidentally, the arrangement relationship between these recording heads and the reproducing heads may of course be an arrangement other than that shown in FIG.

FIGS. 22 to 27 show the track numbers of the magnetic disk 14 in the single-sided recording type hard disk drive of the recording / reproducing apparatus with the playback function according to the fourth embodiment, and the ring buffer realized by this hard disk drive. FIG. 3 is a conceptual diagram showing a correspondence relationship with a ring address.

In FIG. 22, A1, A2,..., A (n
-1), An is the ring address of the ring buffer, T
1, T2,..., T (n-1), Tn are the magnetic disks 14
2 shows the track formed.

In the above configuration, FIG.
The recording operation and the reproducing operation by the apparatus of the fourth embodiment will be described with reference to FIGS. 9, 20, 21, 22 to 27, and the data recording method of the present invention will be described at the same time.

(I) First, the recording / reproducing operation when one single-sided recording type magnetic disk having n tracks is used will be described.

(1) First, the recording operation will be described. Here, the magnetic disk 14 is mounted such that the recording surface of the magnetic disk 14 faces upward, and track numbers T1, T2,..., T (n-
It is assumed that tracks 1) and Tn are formed, and the recording head is waiting at the outermost peripheral portion of the magnetic disk 14. Therefore, at the start of recording, the first recording head 1
Only by 7a, recording is started sequentially from the track number T1 on the outermost peripheral portion of the magnetic disk 14 toward the inner peripheral direction.

Specifically, the recording head position controller 23b
Recording head drive mechanism 21 based on a control signal from
Drives the first recording head 17a as follows. That is, the first recording head 17a is configured as shown in FIGS.
As shown in FIG. 4, the ring addresses of the ring buffer are sequentially changed from A1 to A2, A3,..., A (m-2), A (m-
1), the track number T1 is incremented by 1 each time Am is increased.
Start recording from and move inward.
For every other track, ie, track numbers T3, T
5,..., T (n-5), T (n-3), T (n-
Recording is sequentially performed on the track 1) one by one.

As described above, from the track number T1 at the outermost peripheral portion of the magnetic disk 14, every other track is sequentially moved to the track of the track number in the inner circumferential direction, and the ring address changes from Am to A (m + 1). Track T (n-
When the recording of 1) is completed and the recording to the track number Tn at the innermost peripheral portion is completed, the first head 17a performs the recording by the above operation while moving in the outer peripheral direction in the opposite direction as before. Recording is sequentially performed on tracks that have not been recorded. That is, as shown in FIGS. 25 to 27, the first recording head 17a sets the ring address of the ring buffer to A (m
+1) to A (m + 2), the tracks Tn to T
(N-2), and then the ring address becomes A
A (m + 2), A (m + 3),...
Each time A (n-2), A (n-1), An is incremented by 1, the track numbers T (n-2), T (n-4),.
The recording operation is performed while moving every other track toward the outermost periphery in the order of..., T6, T4, and T2.

In summary, the position control of the recording head is as follows. However, it is assumed that the track number n is an even number. Track T1 → track T3 → track T5 → ... → track Tn-3 → track Tn-1 → track Tn → track Tn-2 → track Tn-4 ... → track T4 → track T2 And the recording head returns to track T2, The ring address of the ring buffer increases by 1 from An and A1
After that, the recording head moves to the track T1 again and repeats a series of operations thereafter. The above-described series of operations are constantly repeated by the first recording head 17a, so that the single-sided recording type magnetic disk 14
It is possible to always record the video signal sent from the present time to a point in time that is a predetermined time.

As described above, the recording head is moved from the predetermined track of the recording disk having one side as the recording surface toward the inner circumference or the outer circumference, data is recorded on the intermittent tracks, and thereafter, the data is recorded. By moving the first recording head 17a in the direction opposite to the direction and recording data on the remaining tracks on which recording has not been performed, when the recording head moves for the recording operation,
The amount of movement of the recording head is equal for all tracks except the innermost and outermost tracks of the magnetic disk,
Further, the movement amount of the innermost circumference and the outermost circumference is smaller than that of the other tracks.

Therefore, as in the prior art of the present invention, data is sequentially recorded on adjacent tracks from the outermost track to the inner track, and when recording is completed up to the innermost track. In order to perform the next recording, unnecessary operations such as jumping over a large number of tracks and returning to the outermost track position are not required. An extremely useful effect that generation can be prevented can be obtained.

(2) Next, the reproducing operation of the single-sided recording type magnetic disk will be described. The mounting state of the magnetic disk 14 is the same as in the case (1). Here, only the first reproducing head 19a performs the reproducing operation.
At the time of this reproducing operation, the above-mentioned recording operation by the first recording head 17a is also performed in parallel.

(2-1) First, the playback reproduction operation will be described. When an on-air broadcast signal is displayed on the display 10 and a user inputs a command to execute a playback function,
The first reproducing head 19a includes a reproducing head position control unit 23c.
The following operation is performed based on the control signal from the above.

That is, the first reproducing head 19a moves to the track where the first recording head 17a was located a predetermined time before the command input, and the display on the display 10 is changed to the reproduction signal from the first reproducing head 19a. Switch to. Thereafter, the ring address of the ring buffer becomes 1
Each time the first reproducing head 19a is moved, the track is moved in the same manner as the first recording head 17a. Here, it goes without saying that the first reproducing head 19a sequentially reproduces every other track number as described in the recording operation of the first recording head 17a.

That is, reproduction is sequentially started from the track number T1 on the outermost peripheral portion of the magnetic disk 14 toward the inner peripheral direction, and the track numbers T3, T5,..., T (n-
5) The tracks T (n-3) and T (n-1) are sequentially reproduced. After the reproduction of the track of T (n-1) is completed, Tn, T (n-2), T (n-4),
.., T6, T4, and T2 are sequentially reproduced.

At this time, after a predetermined time, the display 10
May be switched to an on-air signal to end the reproducing operation by the first reproducing head 19a, or
By skipping and reproducing the recording track on which data is recorded by the first recording head 17a at an interval such that the recording track is reproduced at a higher speed than at the time of recording, so-called high-speed reproduction is performed without reproducing some of the recording tracks. May be performed. In other words, the high-speed reproduction is a method of shortening the reproduction time by skipping and reproducing a broadcast signal substantially continuously recorded on data.

In this high-speed reproduction, reproduction is performed at a speed higher than the constant speed. For example, in the case of every other frame, track numbers T1 to T5,..., T (n-5), T
The (n-1) tracks are sequentially reproduced. After the reproduction of the track of T (n-1) is completed,
Reproduction is performed sequentially in the order of n, T (n-4),..., T6, T2.

In this high-speed reproduction, the cycle of operation for reproducing one frame of the reproducing head is a repetition of head movement → timing adjustment → data reading → wait time →... This wait time can be reduced. If,
By reducing the waiting time, the same tracks T1, T3, T5,.
(N-5), T (n-3), T (n-1), Tn, T
(N-2), T (n-4), ..., T6, T4, T2
Can be realized by reproducing at a higher speed than recording by the recording head.

When the high-speed reproduction is performed in this manner, the first reproduction head 19a can catch up with the track where the first recording head 17a is located while the high-speed reproduction operation is continued. Therefore, after catching up in this way, the display on the display 10 may be switched to an on-air broadcast signal, and the reproducing operation by the first reproducing head 19a may be ended.

By enabling such high-speed reproduction, it is possible to realize the interruption television function of the operation mode 1 described in the first embodiment. That is, when the viewing of a television program is temporarily interrupted, its broadcast content is recorded, and when the viewing is resumed, the reproduction is performed at a high speed so that the portion interrupted during that time can be viewed. A television receiver that can catch up with an actual broadcast within the time period described above can be realized. Also,
By storing each of the plurality of interruption periods and performing high-speed reproduction thereof, it is possible to realize the multiple interruption function in the first embodiment.

(2-2) Next, the pause reproduction operation will be described. When the user inputs a command for executing the pause playback function while the on-air broadcast signal is displayed on the display 10, the first recording head is input when the command is input. After moving the first reproducing head 19a to the track 17a, the first reproducing head 19a is stopped on the same track, and the recording signal of that track is repeatedly reproduced. In addition, when a user inputs a command to execute the pause playback function while the playback signal from the first playback head 19a is displayed on the display 10, the command is input. In some cases, the first reproducing head 19a is moved to a track where the first reproducing head 19a is located, then stopped, and the recorded signal of that track is repeatedly reproduced. Since a video signal recorded on a track is recorded as one track per frame or one track per field, a still image is reproduced by the above reproduction.

When a command for canceling pause playback is input by the user, the first playback head 19a is moved to the first playback head 19a.
Either the recording head 17a is moved and time-shift reproduction is performed, or the high-speed reproduction is performed until catching up with the track where the first recording head 17a is located. After the first reproducing head 19a catches up with the first recording head 17a, the reproducing operation by the first reproducing head 19a is stopped, and the display on the display 14 is switched to the display of the on-air broadcast signal. By enabling the pause reproduction operation, it is possible to realize the still image reproduction during the interruption of the operation mode 1 described in the first embodiment.

That is, the write data of the hard disk drive at the time of receiving the interruption input is reproduced in a static manner, and the read-in of the hard disk drive is performed at a higher speed than the write speed in response to the see-through input. Alternatively, a still image is reproduced during a plurality of interruption periods, and when the viewing is resumed, the reproduction is performed at a high speed so that the part interrupted during this period can be viewed, and the actual broadcast can be performed within a desired time. A television receiver that can catch up with the target can be realized.

(2-3) Next, the reverse reproduction operation will be described. In this reproducing operation, first, the display on the display 10 is changed from the demodulated signal from the tuner 1 to the first reproducing head 1.
The display is switched to the display of the reproduction signal from 9a. Then, based on the control signal from the reproducing head position control unit 23c, the first reproducing head 19a sets every other track in the reverse order to the order of the track numbers recorded by the first recording head 17a. Reproduce. As a result, the reproduced image is reproduced as a movement that is temporally opposite to the recorded image.

(2-4) Next, the frame-forward playback operation will be described. First, a first example of the frame feed operation will be described. That is, in this case, the first reproducing head 19a is stopped on the same track for a certain period of time, and during that time, the image on the same track is continuously reproduced. Next, the first reproducing head 19a is moved to a track on which a frame next to the currently reproduced track is recorded, and a reproducing operation similar to the above is performed, and such an operation is repeatedly performed. Such a frame-by-frame playback operation is a type of slow playback. On the screen, it appears that the operation of moving one frame and then stopping is repeated.

Next, a second example of the frame feed operation will be described. That is, in this case, the content is basically the same as the content described in the first example except for the following points. In other words, this second
This example compensates for the disadvantage of the first example that the reproduction speed is too slow. Specifically, after the stationary playback operation on the same track for the above-mentioned fixed time, instead of moving to the track where the next frame is recorded, the frame several frames ahead is set so that the playback speed does not become too slow. Is moved to the recorded track. Therefore, the point that the track is skipped and reproduced is common to the above-described high-speed reproduction.

In the second example of the frame feed operation, by appropriately selecting the number of tracks to be skipped, it is possible to set the reproduction time to substantially the same as the normal reproduction operation for sequentially reproducing the tracks. Such frame-by-frame playback equivalent to constant speed playback is also called strobe playback.

More specifically, for example, a normal reproducing operation
An example will be described in which a time T1 is required to sequentially reproduce the first to fifth tracks, and the same time T1 is required to sequentially reproduce the sixth to tenth tracks. In this case, when the reproduction called the above-mentioned strobe reproduction is performed, the reproduction of the first track is performed for a time slightly shorter than the time T1, and the reproduction jumps from the second track to the fifth track without reproducing, and the reproduction of the first track is started. T1 hours after the start, the reproduction of the sixth track is started. The reproduction of the sixth track is performed in the same manner as described above.
This is a time slightly shorter than T1 time.

As described above, the recording-only head and the reproduction-only head are separately provided, so that one recording / reproducing head can be used as a recording / reproducing head like a normal hard disk drive for a data processing device. The operation of frequently moving between the track and the reproduction track in a short cycle becomes unnecessary. For this reason, it is possible to prevent the generation of noise and the drop of frames of the recording data, and to obtain the effect of extending the life of the head drive system.

(II) Next, the recording / reproducing operation in the case where one double-sided recording type magnetic disk having n tracks on each side of the disk is used will be described. 28 to 31 show the track numbers of the magnetic disk 14 in the double-sided recording type hard disk drive of the recording / reproducing apparatus with the playback function according to the fourth embodiment, and the ring shape of the ring buffer realized by the hard disk drive. It is a conceptual diagram which shows the correspondence with an address.

In FIG. 28A, A1,..., An, A
(N + 1),..., A2n are ring addresses of the ring buffer, T1 (1), T2 (1),..., T (n−1) (1),
Tn (1), Tn (2), T (n-1) (2),..., T2 (2)
, T1 (2) are tracks formed on the magnetic disk 14. However, the subscripts (1) and (2) indicate that the tracks are formed on the upper and lower surfaces of the magnetic disk, respectively.

(1) First, the recording operation will be described. Here, the first recording head 17a and the second recording head 17b
The main difference from the case (I) is that data is recorded on both sides of the magnetic disk 14. Thus, the description will be focused on the difference.

The upper surface of the magnetic disk 14, that is, the upper surface of the magnetic disk 14 in FIG.
7a, and the lower surface, that is, the lower surface of the magnetic disk 14 in FIG. 19, is recorded by the second recording head 17b.

More specifically, the recording head position controller 23b
Recording head drive mechanism 21 based on a control signal from
Drives the first recording head 17a together with the second recording head 17b as follows. That is, the first recording head 17a
As shown in FIGS. 28 (b) and 29, the ring-shaped addresses of the ring buffer are sequentially changed from A1 to A2, A3,.
Each time it is incremented by 1 from (n-2), A (n-1), and An, recording starts from the track number T1 (1) on the upper surface of the magnetic disk 14 and moves toward the inner circumferential direction. Track numbers T2 (1), T3 (1), ..., T (n-2)
Recording is sequentially performed on adjacent tracks in the order of (1), T (n-1) (1), and Tn (1). At this time, the second recording head 17b does not perform a recording operation.

Then, after recording on the track number Tn of the innermost peripheral portion of the magnetic disk 14 is completed, the recording head driving mechanism section 21 then turns to the second recording section based on the control signal from the recording head position control section 23b. The second recording head 17b is driven together with the first recording head 17a as follows. That is, the second
As shown in FIG. 30 and FIG. 31, the recording head 17b sets the ring address of the ring buffer to A (n + 1), A
(N + 2), ..., A (2n-2), A (2n-1), A
Every time the number increases by 2n, the recording starts from the track number Tn (2) on the lower surface of the magnetic disk 4 and moves toward the outer circumference, while the track number T (n-1) (2),
T (n-2) (2),..., T3 (2), T2 (2), T1
Recording is sequentially performed on adjacent tracks in the order of (2).

In summary, the position control of the recording head is as follows. Track T1 (1) → Track T2 (1) → Track T3
→ track Tn (1) → track Tn (2) → track Tn-1 (2) ... → track T1 (2) Then, the second recording head returns to track T1 (2) and After the ring address increases by 1 from A2n and returns to A1, the first recording head performs recording on the track T1 (1) again, and a series of operations thereafter are repeated.

The above-described series of operations is performed by the first recording head 17.
a and the second recording head 17b always repeat, so that the broadcast signal sent during a certain period of time from the current time can be always recorded on the double-sided recording type magnetic disk 14.

As described above, the first and second recording heads are moved from a predetermined track on the first recording surface of the recording disk having both surfaces as recording surfaces toward the inner circumference or the outer circumference. Then, data is recorded on each track on the one recording surface by using the first recording head, and then the first and second recording heads are moved in a direction opposite to the moving direction. The recording operation is performed by using the second recording head to record data on each track on the second recording surface of the recording disk, and by repeating this series of recording operations thereafter. In the movement of the recording head, there is an effect that there is no useless movement at the time of the recording operation as in the above-described conventional apparatus, and the occurrence of dropped frames of the recorded data can be prevented.

(2) Next, the reproducing operation of the above-mentioned double-sided recording type magnetic disk will be described. As the playback operation,
There are the above-described playback playback operation, high-speed playback operation, pause playback operation, reverse playback operation, and frame-forward playback operation. These operations are performed except for using both the first reproducing head 19a and the second reproducing head 19b.
This is basically the same as the content described in the above (I).

That is, in the playback reproduction operation, similarly to the recording operation, the track T1 (1) → track T2 (1) → track T3 (1) →... → track Tn (1) → track Tn (2) →
By performing reproduction in the order of track Tn-1 (2)... → track T1 (2), it is possible to always reproduce a broadcast signal sent during a certain period of time from the current time.

The high-speed reproduction operation is performed, for example, by using the track T
1 (1) → Track T3 (1) → ... → Track Tn-2 (1)
→ Track Tn (1) → Track Tn (2) → Track Tn
-2 (2) →... → track T3 (2) → track T1 (2) can be realized by appropriately skipping frames and performing reproduction so that reproduction is faster than during recording. Also,
If it is possible to reduce the waiting time in the operation cycle of the read-only head, high-speed reproduction can be realized by cutting this.

By enabling such high-speed reproduction, it is possible to realize the interruption television function of the operation mode 1 shown in the first embodiment. That is, when the viewing of a television program is temporarily interrupted, its broadcast content is recorded, and when the viewing is resumed, the reproduction is performed at a high speed so that the portion interrupted during that time can be viewed. A television receiver that can catch up with an actual broadcast within the time period described above can be realized.

In addition, by storing each of a plurality of interruption periods and performing high-speed reproduction thereof, it is possible to realize the multiple interruption function in the first embodiment.

In the pause playback operation, the first playback head 19a or the second playback head is moved to a desired track and then stopped, and the recorded signal of that track is repeatedly played back. The video signal recorded on the track is 1
Since recording is performed as one track per frame or one track per field, a still image is reproduced by the above reproduction.

Since the pause reproduction operation is possible, it is possible to realize the still image reproduction during the interruption of the operation mode 1 shown in the first embodiment. That is, the write data of the hard disk drive at the time of receiving the interruption input is reproduced in a static manner, and the read-in of the hard disk drive is performed at a speed higher than the write speed in response to the see-through input, so that the data is read once or plural times. When a still image is played back during the interruption period, and when the viewing is resumed, the playback is performed at a high speed so that the part interrupted during this period can be seen, and catch up with the actual broadcast within the desired time , A television receiver capable of performing such operations can be realized.

The reverse reproducing operation is performed by the first reproducing head 1.
9a or the second reproducing head 19b is the first recording head 1
By reproducing every other track in an order opposite to the order of the track numbers recorded by the first recording head 7a or the first recording head 17b, the reproduced image moves in the opposite direction to the recorded image in time. Will be played as

Further, in the frame forward playback operation, the first playback head 19a or the second playback head 19b is stopped on the same track for a certain period of time, and during that time, the image on the same track is continuously played. Next, the first reproducing head 19a or the second reproducing head 19a
The reproducing head 19b is moved to a track on which a frame next to the currently reproduced track is recorded, and the same reproducing operation as described above is performed, and such an operation is repeatedly performed.

After the still playback operation on the same track for a certain period of time, instead of moving to the track where the next frame is recorded, the frame is moved to the track where the frame several frames ahead is recorded. It is also possible to perform strobe reproduction.

At the time of the reproducing operation, needless to say, the above-described recording operation by the first recording head 17a and the second recording head 17b is also performed, and the recording operation is performed in the same manner as described in (I). In the movement of the recording head, there is obtained an effect that there is no useless movement at the time of the recording operation as in the above-described conventional apparatus, and the occurrence of dropped frames of the recorded data can be prevented.

Embodiment 5 FIG. Next, as Embodiment 5 of the present invention, a configuration of a recording / reproducing apparatus with a playback function using a plurality of magnetic disks having n tracks will be described with reference to FIGS. The main difference between the fifth embodiment and the fourth embodiment is that a plurality of magnetic disks are used, and this difference will be mainly described.
Here, components that are basically the same as those in Embodiment 4 are given the same reference numerals, and descriptions thereof are omitted.

As shown in FIG. 32, the recording / reproducing apparatus of the fifth embodiment is configured to use m (m is an integer of 2 or more) magnetic disks 141, 142,..., 14m. . Therefore, the recording head and the reproducing head have the same configuration as that described in the first embodiment (FIG. 20, FIG.
FIG. 21) is provided for each magnetic disk.
Specifically, in FIG. 32 which performs single-sided recording, the first recording head 171a and the first reproducing head 191a used for the first magnetic disk 141 and the first recording head 172a and the second recording head 172a used for the second magnetic disk 142 are used. 1 playback head 192
a,... used for the m-th magnetic disk 14m,
It comprises a recording head 17ma and a first reproducing head 19ma. These recording heads 171a,.
7ma are integrally moved by the recording head driving mechanism 21, and the reproducing heads 191a,.
ma is configured to move integrally by the reproducing head drive mechanism 22.

In FIG. 33 for performing double-sided recording, the first and second recording heads 171a and 171b and the first and second reproducing heads 191 used for the first magnetic disk 141 are used.
a, 191b, first and second recording heads 172a and 172b, and first and second reproducing heads 192a and 192b used for the second magnetic disk 142,.
First and second recording heads 17ma and 17mb and first and second reproducing heads 19m used for magnetic disk 14m
a and 19 mb. These recording heads 171a, 171b,..., 17ma, 17mb
Are moved together by the recording head drive mechanism 21, and the reproducing heads 191a, 191b,.
., 19 ma and 19 mb are the read head drive mechanism 22
It is constituted so that it may move together.

FIGS. 34 to 51 show magnetic disks 141,... In a single-sided recording type hard disk drive of a recording / reproducing apparatus with a playback function according to the fifth embodiment.
FIG. 3 is a conceptual diagram showing the correspondence between the track numbers of the 14m portion and the ring addresses of the ring buffer realized by the hard disk drive device 20.

In the figure, RB is a ring buffer, D is
1 to Dm indicate magnetic disks. The recording and reproducing operation of the fifth embodiment will be described with reference to FIGS. 32 and 34 to 51 for the above configuration.

(III) First, the recording / reproducing operation when m single-sided recording type magnetic disks having n tracks on each surface are used will be described. (1) First, the recording operation will be described. Each recording head is
The recording operation is performed on the recording surface on the top surface of each magnetic disk every other track while moving from the outermost peripheral portion to the inner peripheral portion of each of the magnetic disks 141,. The recording operation is performed on the recording surface on the upper surface of each magnetic disk at every other track while moving from the portion to the outer peripheral portion. Specifically, based on a control signal from the recording head position control unit 23b in FIG. 32, the recording head drive mechanism unit 21 controls each of the magnetic disks 141,.
m, the first recording heads 171a, 172a,.
., 17 ma are driven as follows.

First, first recording heads 171a,.
.., 17 ma are the respective magnetic disks 141,.
The recording operation in the state of being at the track number T1 on the outermost periphery of the upper surface of 4 m is as follows. That is, first, data is recorded on the track number T1 of the first magnetic disk 141 by the first recording head 171a. Next, as the ring address of the ring buffer increases from A1 to A2, data is recorded on the track number T1 of the second magnetic disk 142 by the second recording head 172a. In this manner, as shown in FIGS. 34 and 36, the ring address of the ring buffer is incremented by 1 from A1 and reaches Am, and the m-th recording head 17ma assigns the track number T1 of the m-th magnetic disk 14m to the track number T1. The same recording operation is sequentially repeated until data is recorded.

Next, when the ring address of the ring buffer changes from Am to Am + 1, the first recording heads 171a,.
Track number T at the outermost periphery of the upper surface of 1, ..., 14m
The track number T3, which is one adjacent to the inner circumference side, jumps from 1
And then the ring address of the ring buffer becomes A
The following recording operation is performed in the same manner as the above operation until the value increases by 1 from m + 1 and reaches A2m. That is, as shown in FIGS. 37 to 39, the first recording heads 171a,.
., The order of recording by 17 ma is the first magnetic disk 1
41, the track number T3 of the second magnetic disk 142,..., The track number T3 of the m-th magnetic disk 14m.

The movement of the recording head and the recording operation as described above are sequentially performed, and as shown in FIGS. 40 to 42, the ring-shaped address of the ring buffer is Am (n / 2-1).
By incrementing by one from +1 and reaching Am (n / 2), the track number T of the inner peripheral portion of the m-th magnetic disk 14m is increased.
After completing n-1 (1),..., Tn-1 (m),
Subsequently, the recording operation is performed on the tracks on the upper surface of each of the magnetic disks 141,..., 14m while moving from the track number Tn at the innermost periphery to the outer periphery.

That is, as shown in FIGS. 43 to 45,
The ring address of the ring buffer is Am (n / 2) +
By increasing by 1 from 1 and reaching Am (n / 2 + 1), recording is performed on each track Tn at the innermost peripheral portion of each of the magnetic disks 141,..., 14m. The track number Tn of the disk 141, the track number Tn of the second magnetic disk 142,..., The track number Tn of the m-th magnetic disk 14m.

Hereinafter, as shown in FIGS. 46 to 48,
If the ring address of the ring buffer is Am (n / 2 +
1) By incrementing by 1 from +1 and reaching Am (n / 2 + 2), the track numbers Tn-2 (1),..., Tn
Recording is performed on each magnetic disk while moving sequentially one track at a time toward the outer periphery, in the same manner as described above. As shown in FIGS. 49 to 51, the ring address of the ring buffer is Am (n-
1) By increasing by 1 from +1 and reaching Amn,
Track number T2 at the outermost periphery of the m-th magnetic disk 4m
(1) to T2 (m) are recorded, and this record
The recording operation for one magnetic disk is completed.

In summary, the position control of the recording head is as follows. Here, it is assumed that there are m single-sided disks, and the parentheses indicate the type of the head for executing the recording operation. Track T1 (1) → Track T1 (2) → ... → Track T1 (m) → Track T3 (1) → Track T3 (2) → ... → Track T3 (m) ... → Track Tn-1 (1) → Track Tn-1 (2) →... Track Tn-1 (m) → Track Tn (1) → Track Tn (2) →... → Track Tn (m) → Track Tn-2 (1) → Track Tn-2 ( 2) →→ track Tn−2 (m) →→ track T2 (1) → track T2 (2) →… → track T2 (m) Then, the recording head returns to track 1 and the ring address of the ring buffer is After changing from Amn to A1,
The recording head moves to track 1 on the disk surface again,
Thereafter, the above series of operations are repeated.

By repeating the above series of operations by each recording head, a broadcast signal sent during a certain period of time from the current time is always recorded on m double-sided recording type magnetic disks 141 to 14m. You can do it. By increasing the number of magnetic disks, the capacity of recorded data can be further increased.

As a result, even if the number of magnetic disks increases during the movement of the recording head for the recording operation,
This eliminates useless movements during the recording operation as in the above-described conventional apparatus, and has the effect of preventing the occurrence of dropped frames in the recorded data.

When 2 m single-sided recording disks are present, the position control of the recording head can be performed as follows. Track T1 (1) → Track T1 (2) → ... → Track T1 (m) → Track T2 (1) → Track T2 (2) → ... → Track T2 (m) ... → Track Tn-1 (1) → Track Tn-1 (2) →… → Track Tn-1 (m) → Track Tn (1) → Track Tn (2) →… → Track Tn (m) → Track Tn (m + 1) → Track Tn (m + 2) → Track Tn (2m) → Track Tn-1 (m + 1) → Track Tn-1 (m + 2) → ... → Track Tn-1 (2m) ... → Track T1 (m + 1) → Track T1 (m + 2) → Track T1 (2m) Then, after the recording head returns to track 1 and the ring-shaped address of the ring buffer changes from A2 mn to A1, the recording head re-enters the tracks of disks 1 to m. 1 and a series of operations thereafter are repeated.

As a result, the moving time of the head can be further reduced, and the occurrence of dropped frames in the recorded data can be more reliably prevented.

(2) Next, the reproducing operation will be described. The playback operation includes the playback playback operation, the high-speed playback operation, the pause playback operation, the reverse playback operation, and the frame-forward playback operation described in the first embodiment. These operations are basically the same as those described above except that a plurality of magnetic disks are used. That is,
At the time of playback playback operation, track T1 (1) → track T1 (2) →... → track T1 (m) → track T3 (1) → track T3 (2) →... → track T3 (m). Track Tn-1 (1) → Track Tn-1 (2) → ... → Track Tn-1 (m) → Track Tn (1) → Track Tn (2) → ... → Track Tn (m) → Track Tn-2 (1) → track Tn-2 (2) →... → track Tn-2 (m)... → track T2 (1) → track T2 (2) →... → track T2 (m) , Or when there are 2 m single-sided recording discs, track T1 (1) → track T1 (2) →... → track T1 (m) → track T2 (1) → track T2 (2) ) → Track T2 (m)… Track Tn-1 (1) → Track Tn-1 (2) →… → Track Tn-1 (m) → Track Tn (1) → Track Tn (2) → → Track Tn (m) → Track Tn (m + 1) → Track Tn (m + 2) →… → Track Tn (2m) → Track Tn-1 (m + 1) → Track Tn-1 (m + 2) By reading a plurality of magnetic disks in the order of →→ track Tn-1 (2m) →→ track T1 (m + 1) → track T1 (m + 2) → ・ ・ ・ →→ track T1 (2m)
The data can be reproduced and displayed on a display after a certain period of time from when the data was recorded.

In the high-speed reproduction operation, track T1 (1) → track T1 (3) →... → track T1 (m) → track T3 (1) → track T3 (3) →. m)… → track Tn-1 (1) → track Tn-1 (3) →… → track Tn-1 (m) → track Tn (1) → track Tn (3) → ... → track Tn (m) → Track Tn-2 (1) → track Tn-2 (3) →... → track Tn-2 (m)... → track T2 (1) → track T2 (3) → ... → track T2 (m) By playing back every other magnetic disk and playing back data from multiple magnetic disks,
This can be achieved.

Alternatively, if there are 2 m single-sided recording disks, track T1 (1) → track T1 (3) →... → track T1 (m) → track T2 (1) → track T2 (3) →. T2 (m)-> Track Tn-1 (1)-> Track Tn-1 (3)->-> Track Tn-1 (m)-> Track Tn (1)-> Track Tn (3)->-> Track Tn (m ) → Track Tn (m + 1) → Track Tn (m + 3) → ... → Track Tn (2m) → Track Tn-1 (m + 1) → Track Tn-1 (m + 3) → ... → Track Tn-1 (2
m)... → track T1 (m + 1) → track T1 (m + 3) →... → track T1 (2m) to reproduce data from a plurality of magnetic disks by reproducing at least every other magnetic disk. By doing so, the high-speed playback operation has a playback head separately from the recording head. This can be achieved by reducing the waiting time during operation.

By enabling such high-speed reproduction, it is possible to realize the interruption television function of the operation mode 1 described in the first embodiment. That is, when the viewing of a television program is temporarily interrupted, its broadcast content is recorded, and when the viewing is resumed, the reproduction is performed at a high speed so that the portion interrupted during that time can be viewed. A television receiver that can catch up with an actual broadcast within the time period described above can be realized.

Further, by storing each of the plurality of interruption periods and performing high-speed reproduction after the end of the last interruption period, it is possible to realize the plurality of interruption functions in the first embodiment. Become. In the pause reproduction operation, the reproduction head is moved to a desired track and then stopped to repeatedly reproduce the recording signal of the track. Since a video signal recorded on a track is recorded as one track per frame or one track per field, a still image is reproduced by the above reproduction. Since the pause reproduction operation is enabled, the still image reproduction during the interruption of the operation mode 1 described in the first embodiment can be realized.

That is, the write data of the hard disk drive at the time of receiving the interruption input is played back statically, and the read-in of the hard disk drive is performed at a higher speed than the write speed in response to the see-through input. Alternatively, a still image is reproduced during a plurality of interruption periods, and when the viewing is resumed, the reproduction is performed at a high speed so that the part interrupted during this period can be viewed, and the actual broadcast can be performed within a desired time. A television receiver that can catch up with the target can be realized.

The reverse playback operation is performed by the playback head playing back every other track in the reverse order of the track numbers recorded by the recording head.
The reproduced image is reproduced as a movement that is temporally opposite to the recorded image.

Further, in the frame-forward playback operation, the playback head is stopped on the same track for a certain period of time, and during that time, the image on the same track is continuously played. Next, the reproducing head is moved to the track on which the next frame of the currently reproduced track is recorded, and the same reproducing operation as described above is performed, and such an operation is repeatedly performed.

After the still playback operation on the same track for a certain period of time, instead of moving to the track on which the next frame is recorded, the frame is moved to the track on which a frame several frames ahead is recorded. It is also possible to perform strobe reproduction.

At the time of these reproducing operations, needless to say, the above-mentioned recording operations by the first recording heads 171a to 171ma are also performed. Even when the number of magnetic disks increases in this way, the above (II) In the same manner as described in (1), when the recording head is moved for the recording operation, there is an effect that there is no useless movement in the recording operation as in the above-described conventional apparatus, and the occurrence of dropped frames of the recorded data can be prevented. can get.

(IV) Next, the recording / reproducing operation when m double-sided recording type magnetic disks having n tracks on each surface are used will be described. 52 to 6
Reference numeral 6 denotes the track numbers of the magnetic disks 141,..., 14m in the double-sided recording type hard disk drive of the recording / reproducing apparatus with the playback function of the fifth embodiment, and the ring of the ring buffer realized by the hard disk drive. It is a conceptual diagram which shows the correspondence relationship with a state address.

The above configuration is described with reference to FIGS.
The recording and reproducing operations of the fifth embodiment will be described with reference to FIGS. A recording / reproducing operation when m double-sided recording type magnetic disks having n tracks on each side are used will be described.

(1) First, the recording operation will be described. Each recording head performs a recording operation on the recording surface on the upper surface of each magnetic disk while moving from the outermost peripheral portion to the inner peripheral portion of each magnetic disk 141,. The recording operation is performed on the recording surface on the lower surface of each magnetic disk while moving from the portion toward the outer peripheral portion. In particular,
Based on the control signal from the recording head position control unit 23b in FIG. 21, the recording head driving mechanism unit 21 controls the first recording head 17 used for each of the magnetic disks 141,.
, 17a, the second recording head 1
Driving is performed as follows together with 71b, 172b,..., 17mb.

First, first recording heads 171a,.
.., 17 ma are the respective magnetic disks 141,.
The recording operation in the state of being at the track number T1 on the outermost periphery of the upper surface of 4 m is as follows.

That is, first, as shown in FIG. 52, when the ring address of the ring buffer becomes A1,
The first magnetic disk 141 is moved by the first recording head 171a.
Is recorded in the track number T1 (1). next,
As the ring address of the ring buffer increases from A1 to A2, data is recorded on the track number T1 (1) of the second magnetic disk 142 by the second recording head 172a as shown in FIG. In this way,
As the ring address of the ring buffer increases by 1 from A2 and reaches Am, as shown in FIG.
The m-th recording head 17ma allows the m-th magnetic disk 14
m until the data is recorded on track number T1 (1).
The same recording operation is sequentially repeated.

Next, when the ring address of the ring buffer changes from Am to Am + 1, the first recording heads 171a,.
Track number T at the outermost periphery of the upper surface of 1, ..., 14m
After moving from 1 to the track number T2 adjacent on the inner circumference side, as shown in FIGS. 55 to 57, the ring-shaped address of the ring buffer is incremented by 1 from Am + 1 to A2m.
The following recording operation is performed in the same manner as described above until the recording operation reaches. That is, the first recording heads 171a,.
The order of recording by a is the order of the track number T2 of the first magnetic disk 141, the track number T2 of the second magnetic disk 142,..., and the track number T2 of the m-th magnetic disk 14m.

The above-described movement of the recording head and the recording operation are sequentially performed, and the ring address of the ring buffer is incremented by one from A2m + 1, and reaches Am (n−1) +1 to Amn. As shown in FIG. 60, after the track numbers Tn (1) to Tn (m) at the innermost periphery of the m-th magnetic disk 14m are completed, subsequently, each of the magnetic disks 141,. The recording operation is performed on the lower track while moving from the innermost circumference to the outer circumference. In this case, the second recording head 171
., 17 mb are used for the recording operation. That is, as shown in FIG. 61 to FIG. 63, the ring-shaped address of the ring buffer increases by one from Amn + 1 and reaches Am (n + 1), whereby the innermost peripheral portion of each of the magnetic disks 141,. Each track Tn
, The order of the track number Tn of the first magnetic disk 141, the track number Tn of the second magnetic disk 142,..., The track number Tn of the m-th magnetic disk 14m.

Hereinafter, while sequentially moving one track at a time toward the outer periphery, the order of recording on each magnetic disk is performed in the same order as described above.
As shown in FIG. 6, the recording operation for the m magnetic disks makes one cycle by recording the track numbers T1 (1) to T1 (m) on the outermost periphery of the m-th magnetic disk 14m.

In summary, the position control of the recording head is as follows. However, there are m double-sided disks,
The type in the parentheses indicates the type of the head for executing the recording operation. Track T1 (1) → Track T1 (2) → ... → Track T1 (m) → Track T2 (1) → Track T2 (2) → ... → Track T2 (m) ... → Track Tn (1) → Track Tn ( 2) → Track Tn (m) The above is the recording operation on the upper surface of the disk. Subsequently, → track Tn (1) → track Tn (2) → ... → track Tn (m) → track Tn-1 (1) → track Tn-1 (2) →... → track Tn-1 (m). → Track T1 (1) → Track T1 (2) →... → Track T1 (m) The above is the recording operation of the lower surface of the disk. Then, the recording head returns to the track T1 on the back surface of the disk, and after the ring-shaped address of the ring buffer changes from A2mn to A1, the recording head moves again to the track T1 on the disk surface, and performs a series of operations thereafter. repeat.

By repeating the above series of operations by each recording head at all times, a broadcast signal transmitted during a certain period of time from the present time is always recorded on m double-sided recording type magnetic disks 141 to 14m. You can do it. By increasing the number of magnetic disks, the capacity of recorded data can be further increased. Thus, even when the number of magnetic disks increases during the movement of the recording head for the recording operation, useless movement during the recording operation as in the above-described conventional apparatus is eliminated, and the occurrence of dropped frames of the recorded data can be prevented. The effect is exhibited.

When there are 2 m double-sided recording disks, the position of the recording head can be controlled as follows, for example. Track T1 (1) → Track T1 (2) → ... → Track T1 (m) → Track T2 (1) → Track T2 (2) → ... → Track T2 (m) ... → Track Tn (1) → Track Tn ( 2) →… → Track Tn (m) → Track Tn (m + 1) → Track Tn (m + 2) →… → Track Tn (2m) → Track Tn-1 (m + 1) → Track Tn-1 ( m + 2) → track Tn-1 (2m) → track T1 (m + 1) → track T1 (m + 2) → ... → track T1 (2m) The above is the recording operation on the upper surface of the disk. Subsequently, the same recording operation is performed on the lower surface of the disk.

As described above, when the number of magnetic disks is increased in the movement of the recording head for the recording operation by the method of moving from the outer circumference to the inner circumference with the disks 1 to m and from the inner circumference to the outer circumference with the disks m + 1 to 2 m. However, there is an effect that useless movement during a recording operation as in the above-described conventional apparatus is eliminated, and occurrence of dropped frames of recorded data can be prevented. In this case, the number of disks need not be an even number.

(2) Next, the reproducing operation will be described. The playback operation includes the playback playback operation, the high-speed playback operation, the pause playback operation, the reverse playback operation, and the frame-forward playback operation described in the first embodiment. These operations are basically the same as those described above except that a plurality of magnetic disks are used.

That is, in the case of the playback reproduction operation, the track T1 (1) → track T1 (2) →... → track T1 (m) → track T2 (1) → track T2 (2) →. (m)... → track Tn (1) → track Tn (2) →... → track Tn (m) The above is the reproduction operation of the upper surface of the disk. Subsequently, → track Tn (1) → track Tn (2) → ... → track Tn (m) → track Tn-1 (1) → track Tn-1 (2) →... → track Tn-1 (m). → Track T1 (1) → Track T1 (2) →... → Track T1 (m) The above is the reproduction operation of the lower surface of the disk. By playing back data from multiple magnetic disks in these order,
The data can be reproduced and displayed on a display after a certain period of time from when the data was recorded.

When there are 2 m double-sided recording disks, for example, track T1 (1) → track T1 (2) →... → track T1 (m) → track T2 (1) → track T2 (2) → … → Track T2 (m)… → Track Tn (1) → Track Tn (2) →… → Track Tn (m) → Track Tn (m + 1) → Track Tn (m + 2) → ... → Track Tn ( 2m) → Track Tn-1 (m + 1) → Track Tn-1 (m + 2) → ... → Track Tn-1 (2m) ... → Track T1 (m + 1) → Track T1 (m + 2) → ... → Track T1 (2m) The above is the reproduction operation of the upper surface of the disk. Subsequently, the same reproducing operation is performed on the lower surface of the disk.

By reproducing data from a plurality of magnetic disks in such a manner that the disks 1 to m move from the outer periphery to the inner periphery and the disks m + 1 to 2 m move from the inner periphery to the outer periphery, these data are reproduced. The data can be reproduced and displayed on a display after a certain period of time from when the data was recorded. In this case, the number of disks need not be an even number.

In the high-speed reproduction operation, track T1 (1) → track T1 (3) →... → track T1 (m) → track T2 (1) → track T2 (3) →. m)... → track Tn (1) → track Tn (3) →... → track Tn (m) The above is the reproduction operation of the upper surface of the disk. Subsequently, → track Tn (1) → track Tn (3) → ... → track Tn (m) → track Tn-1 (1) → track Tn-1 (3) →... → track Tn-1 (m). → Track T1 (1) → Track T1 (3) →... → Track T1 (m) The above is the reproduction operation of the lower surface of the disk. This can be realized by reproducing each magnetic disk at least every other order in the order of, and reproducing data from a plurality of magnetic disks.

When there are 2 m double-sided recording disks, for example, track T1 (1) → track T1 (3) →... → track T1 (m) → track T2 (1) → track T2 (3) → … → Track T2 (m)… → Track Tn (1) → Track Tn (3) →… → Track Tn (m) → Track Tn (m + 1) → Track Tn (m + 3) →… → Track Tn ( 2m) → Track Tn-1 (m + 1) → Track Tn-1 (m + 3) → ... → Track Tn-1 (2m) ... → Track T1 (m + 1) → Track T1 (m + 3) → ... → Track T1 (2m) The above is the reproduction operation of the upper surface of the disk. Subsequently, the same reproducing operation is performed on the lower surface of the disk.

In this manner, each magnetic disk is reproduced at every other or more by the method of moving from the outer circumference to the inner circumference with the disks 1 to m and from the inner circumference to the outer circumference with the disks m + 1 to 2 m.
This can be realized by reproducing data from a plurality of magnetic disks. In this case, the number of disks need not be an even number. Also, the high-speed reproduction operation can be realized by cutting the waiting time of the reproducing head, if possible, instead of skipping the tracks or discs as described above.

By enabling such high-speed reproduction, it is possible to realize the interruption television function of the operation mode 1 shown in the first embodiment. That is, when the viewing of a television program is temporarily interrupted, its broadcast content is recorded, and when the viewing is resumed, the reproduction is performed at a high speed so that the portion interrupted during that time can be viewed. A television receiver that can catch up with an actual broadcast within the time period described above can be realized.

Further, by storing each of a plurality of interruption periods and performing high-speed reproduction after the end of the last interruption period, it is possible to realize the multiple interruption function in the first embodiment. Become.

In the pause reproduction operation, the reproduction head is moved to a desired track and then stopped to repeatedly reproduce the recording signal of the track. The video signal recorded on the track is one track or one frame per frame.
Since one track is recorded per field, a still image is reproduced by the above reproduction. With this pause playback operation, it is possible to realize still image playback during the interruption of the operation mode 1 shown in the first embodiment.

That is, the write data of the hard disk drive at the time of receiving the interruption input is played back statically, and the read-in of the hard disk drive is performed at a higher speed than the write speed in response to the see-through input, so that once Alternatively, a still image is reproduced during a plurality of interruption periods, and when the viewing is resumed, the reproduction is performed at a high speed so that the part interrupted during this period can be viewed, and the actual broadcast can be performed within a desired time. A television receiver that can catch up with the target can be realized.

[0219] The reverse playback operation is performed by the playback head reproducing every other track in the reverse order of the track numbers recorded by the recording head.
The reproduced image is reproduced as a movement that is temporally opposite to the recorded image.

Further, in the frame-forward playback operation, the playback head is stopped on the same track for a certain period of time, and during that time, the image on the same track is continuously played back. Next, the reproducing head is moved to the track on which the next frame of the currently reproduced track is recorded, and the same reproducing operation as described above is performed, and such an operation is repeatedly performed.

After the stationary reproduction operation on the same track for a certain period of time, instead of moving to the track on which the next frame is recorded, the frame is moved to the track on which a frame several frames ahead is recorded. It is also possible to perform strobe reproduction.

At the time of this reproducing operation, needless to say, the above-mentioned recording operation by the first recording heads 171a to 17ma and the second recording heads 191a to 19ma is also performed. Even if the number of print data increases, as described in (II) above, in the movement of the print head for the print operation, there is no useless movement during the print operation as in the above-described conventional apparatus, and the dropped frames of the print data do not occur. The effect that generation | occurrence | production of can be prevented is acquired.

Embodiment 6 FIG. Embodiment 4 and Embodiment 4
In 5, the case where one broadcast signal is reproduced on the entire surface of the display is described. However, the present invention is not limited to this. For example, a configuration in which broadcast signals of a plurality of channels are reproduced may be used. In this case, as shown in FIGS. 67 and 68, the same configuration as the tuner 1, the information compression circuit 2, and the recording circuit 3 described with reference to FIGS. It is provided individually for every 14 m.

In FIGS. 67 and 68, the tuner 101 and the information compression circuit 1 are used for the first magnetic disk 141.
02, and the recording circuit 103 is the second magnetic disk 142
, The tuner 201, the information compression circuit 202, and the recording circuit 203 are ...
, A tuner m01, an information compression circuit m02, and a recording circuit m03 are provided. The reproducing device section 120 includes a reproducing head selecting section 121 for selecting a reproducing head according to a magnetic disk to be reproduced, a reproducing circuit 122, and an information expanding circuit 123.

The recording operation for each magnetic disk here is basically the same as that described in the fourth embodiment when one magnetic disk is used, except for the following points. That is, in the case of the sixth embodiment shown in FIG. 67 and FIG.
For every 41 to 14 m, broadcast signals of different channels are recorded simultaneously and one by one on both sides thereof. By providing the reproducing head separately from the recording head, high-speed reproduction is possible. Therefore, by utilizing this effect, one of the tuners is used as a main tuner, and the broadcast content of the main tuner when the broadcast of the main tuner is extended is recorded by another tuner. By playing back the content at high speed and playing back the normal broadcast when it catches up with the broadcast content on the air, so-called duplication of broadcast time can be eliminated.

Any one of the signals of the plurality of tuners
One is reproduced on the display, the signals of the remaining tuners are recorded on the magnetic disk, and one of them is reproduced at a high speed to catch up with the broadcast on the air, and the normal reproduction is performed, and this operation is performed every time the channel is switched. This makes it possible to realize a zapping connection in which all broadcast contents can be viewed without lacking.

At the time of this reproducing operation, needless to say, the above-mentioned recording operation by the first recording heads 171a to 171ma and the second recording heads 191a to 19ma is also performed. Even if the number of print data increases, as described in (II) above, in the movement of the print head for the print operation, there is no useless movement during the print operation as in the above-described conventional apparatus, and the dropped frames of the print data do not occur. The effect that generation | occurrence | production of can be prevented is acquired.

As shown in FIGS. 69 and 70, a single-sided or double-sided recording magnetic disk drive may be provided for each tuner. By doing so, the position of the reproducing head can be controlled independently of each other, so that the recording signals at different times of a plurality of channels can be reproduced simultaneously.

Embodiment 7 FIG. Embodiment 4 and Embodiment 4
In the fifth and sixth embodiments, the case where one broadcast signal is reproduced on the entire surface of the display is described. However, the present invention is not limited to this. For example, by dividing the screen, the broadcast signals of a plurality of channels are simultaneously reproduced. Of course it is good.
In this case, as shown in FIGS. 71 and 72, FIG.
The same configuration as the tuner 1, the information compression circuit 2, and the recording circuit 3 described with reference to FIG.
It is provided individually for every 41 to 14 m.

In FIGS. 71 and 72, the tuner 101 and the information compression circuit 1 are used for the first magnetic disk 141.
02, and the recording circuit 103 is the second magnetic disk 142
, The tuner 201, the information compression circuit 202, and the recording circuit 203 are ...
, A tuner m01, an information compression circuit m02, and a recording circuit m03 are provided. The reproducing device unit 120 reproduces the recording signals of a plurality of channels simultaneously by reproducing a reproducing head selecting unit 121 for selecting a reproducing head, a reproducing circuit 122, an information decompressing circuit 123, and a plurality of channels according to a magnetic disk to be reproduced. A multi-window combining circuit 12 for outputting the same on one display 10
4 is provided.

The recording operation for each magnetic disk here is basically the same as that described in the fourth embodiment when one magnetic disk is used, except for the following points. That is, in the case of the seventh embodiment shown in FIGS. 71 and 72, unlike the above case, each magnetic disk 1
For every 41 to 14 m, broadcast signals of different channels are recorded simultaneously and one by one on both sides. By performing the reproducing operation of the reproducing head at a higher speed than the recording operation of the recording head, or by reducing the waiting time of the reproducing head, high-speed reproduction can be performed. Therefore, by the multi-window combining circuit 124,
It is possible to realize full-time multi-screen playback in which reproduction signals of different channels are combined and multi-window display is performed.

[0232] After the viewer selects one of the multi-window displays, the channel is reproduced by normal reproduction, or the channel is reproduced at high speed and a fast-forward index for returning to normal reproduction when catching up with the on-air broadcast is realized. I can do it.

As shown in FIGS. 73 and 74, the reproducing head may be driven separately for each magnetic disk. By doing so, the position of the reproducing head can be controlled independently of each other, so that the recording signals at different times of a plurality of channels can be reproduced simultaneously.

In the fourth to seventh embodiments, a case has been described in which a magnetic disk is used as a recording disk. However, the present invention is not limited to this. For example, a rewritable disk-shaped medium such as an optical disk may be used. The present invention can be applied, and in this case, the same effects as above can be obtained. Further, in the fourth to seventh embodiments, the information compression method of the information compression circuit is not specifically described. At present, a method of compressing a video signal for each frame is most suitable, but JPEG, MPEG, or If an even more efficient compression code can be realized, the coding method can be used, and in this case, the same effect as described above can be obtained.

[0235]

As described above, according to the first aspect of the present invention, in a television receiver, a tuner for receiving a television video signal and data for storing the video signal received by the tuner for a predetermined time are provided. A data storage unit including a storage unit, a write pointer for writing the video signal in the data storage unit in chronological order, and a read pointer for reading the stored video signal, and reproduction as an output from the data storage unit. A selecting unit that switches between a video signal and a video signal output received by the tuner and outputs one of them; and a control unit that controls an operation of the data storage unit and the selecting unit in accordance with an external input. As a result, the television signal that allows the user to view either the on-air video signal or the time-shifted video signal from the data storage unit Down the receiver there is an effect that can be achieved.

According to a second aspect of the present invention, in the television receiver according to the first aspect, when a write instruction signal is input as the external input signal, the write pointer of the data storage means performs writing. When the reproduction instruction signal is input as the external input signal, the read pointer of the data storage means starts reading, and the selection means selects and outputs a reproduction video signal from the data storage means. Therefore, there is an effect that a television receiver that can reproduce and view the video signal during the period of the write instruction signal and the reproduction instruction signal later can be realized.

According to a third aspect of the present invention, in the television receiver according to the second aspect, during a period from when the write instruction signal is input to when the reproduction instruction signal is input, The read pointer of the storage means reproduces the video signal output from the tuner as a still image when the write instruction signal is input, so that the read pointer is on-air during the period between the write instruction signal and the reproduction instruction signal. There is an effect that a television receiver which can display a still image instead of a video signal and reproduce and view the video signal during this period later can be realized.

According to a fourth aspect of the present invention, in the television receiver according to the first aspect, the television receiver has two or more tuners, and when the write instruction signal is input as the external input signal, the select is performed. The means selects and outputs a video signal received by one tuner, while the write pointer of the data storage means starts writing the video signal received by another tuner and reproduces the video signal as the external input signal. When the instruction signal is input, the read pointer of the data storage means starts reading and reproduces the video signal received by the one tuner, while the select means reproduces the video signal from the data storage means. Since a signal is selected and output, another channel is recorded while watching one channel, and the video signal during this period is Play to watch can television receiver there is an effect that can be achieved.

According to a fifth aspect of the present invention, in the television receiver according to the first aspect, the television receiver has a plurality of tuners, and when the write instruction signal inputted as the external input signal is inputted, The selecting means selects and outputs the video signal received by one of the tuners, and the write pointer of the data storage means starts writing the video signal received by the other tuner of the plurality. Then, when a channel switching instruction signal is input as the external input signal, the read pointer of the data storage means starts reading out of the plurality of the plurality of data recorded until the channel switching signal is input. The video signal received by another tuner is reproduced at a higher speed than the writing speed of the writing pointer, and the selecting means The playback video signal from the data storage means is selected and output. When a certain channel is being watched and another channel is recorded, and the video signal during this time is played back later, the video signal being played back is output. This has the effect of realizing a television receiver that can catch up with the video signal on the air and can reproduce the video signal without generating a missing portion with the video signal on the air.

According to a sixth aspect of the present invention, in the television receiver according to the first aspect, the television receiver has a plurality of tuners, and the data storage means includes an external input signal of the plurality of tuners. And simultaneously recording the video signals received by the plurality of tuners specified by, and when a reproduction instruction signal is input as an external input signal, the data storage means simultaneously stores the plurality of video signals recorded in the data recording means. While reading, the selecting means selects and outputs the plurality of simultaneously read video signals, and when a channel determination instruction signal is input as an external input signal, the selecting means selects one of the plurality of reproduced video signals. To select and output only the playback video signal received and recorded by the tuner specified by the channel determination signal. Because, recorded multi-window a plurality of video signal had been displayed television receiver Utsushidaseru the video signal of the channel the viewer is desired from among them there is an effect that can be achieved.

According to a seventh aspect of the present invention, in the television receiver according to the first aspect, the television receiver has a plurality of tuners, and the data storage means includes an external input signal of the plurality of tuners. And simultaneously recording the video signals received by the plurality of tuners specified by, and when a reproduction instruction signal is input as an external input signal, the data storage means simultaneously stores the plurality of video signals recorded in the data recording means. In addition to the readout, the selecting means selects and outputs the plurality of video signals read out at the same time, so that a plurality of recorded video signals can be displayed in a multi-window to display the video signals. There is an effect that the receiver can be realized.

According to the eighth aspect of the invention, in the television receiver according to any one of the second, fourth, sixth and seventh aspects, when the reproduction instruction signal is input, the read pointer is set to Until the address of the read pointer matches the address of the write pointer, reading is performed at a higher speed than the write speed of the write pointer to reproduce the video signal at high speed. When the two addresses match, the selecting means: Since the output of the above tuner is selected and output, the recorded video signal is played back at high speed, and when it catches up with the video signal on air, it automatically switches to the display of the video signal on air. There is an effect that a television receiver that can perform the operation can be realized.

According to the ninth aspect of the present invention, in the television receiver according to any one of the first to eighth aspects, the data storage section of the data storage means is arranged so that the next to the highest address is the lowest. Since a ring buffer follows the address, data can be recorded and reproduced for a time corresponding to the storage capacity of the ring buffer, and there is an effect that a time shift of a video signal for this time is possible. .

According to the tenth aspect of the present invention,
In the recording / reproducing apparatus, a recording head for recording data on one recording surface of a recording disc, a reproducing head for reproducing recorded data recorded on the recording surface, the recording head, and the reproducing head are individually described. Since the drive control means for driving the head is provided, there is an effect that the generation of noise is reduced as compared with the related art, and the life of the head drive system can be extended as compared with the related art.

According to the eleventh aspect of the present invention,
In the data recording method, the recording head is moved from a predetermined track of a recording disk having one surface as a recording surface toward an inner circumference or an outer circumference, and data is recorded on discrete tracks. Since the recording head is moved in the opposite direction to record data on the remaining tracks on which the recording has not been performed, the moving amount of the recording head of the single-sided recording disk can be made substantially constant, and Wasteful movement can be reduced, and the movement of the recording head can be more efficiently performed as compared with the related art.

According to the twelfth aspect of the present invention,
In the data recording method, the first and second recording heads are moved from a predetermined track on a first recording surface of a recording disk having both surfaces as recording surfaces in an inner or outer peripheral direction, and Data is recorded on each track on the recording surface using the first recording head, and thereafter, the first and second recording heads are moved in a direction opposite to the moving direction, and the recording is performed. Data is recorded on each track on the second recording surface of the recording disk using the second recording head, so that the moving amount of the recording head of the double-sided recording disk can be made substantially constant, There is an effect that useless movement of the recording head can be reduced and the movement of the recording head can be more efficiently performed as compared with the related art.

According to the thirteenth aspect of the present invention,
12. A method for reproducing data recorded by the data recording method according to claim 11, wherein the reproducing head is moved from a predetermined track of the recording disk having one surface as a recording surface toward an inner circumference or an outer circumference to form a discrete track. Data is reproduced from the track, and thereafter, the reproducing head is moved in the direction opposite to the moving direction to reproduce data from the remaining tracks on which the reproduction was not performed. Thus, the amount of movement of the reproducing head can be made substantially constant, and there is an effect that unnecessary movement of the reproducing head can be reduced.

According to the fourteenth aspect of the present invention,
12. A method for reproducing data recorded by the data recording method according to claim 11, wherein a reproducing head is moved from a predetermined track of a recording disk having one surface as a recording surface toward an inner periphery or an outer periphery, and the recording head is moved to a skipped track. To play the data at intervals longer than the recording interval.
Since the reproducing head is moved in the direction opposite to the moving direction, the data is reproduced at intervals larger than the recording interval for the remaining discrete tracks that have not been reproduced in the moving direction. Thus, there is an effect that a disk recorded by a recording method capable of reducing the useless movement of the recording head as described above can be reproduced at high speed without causing useless movement of the reproduction head.

According to the fifteenth aspect of the present invention,
14. The data reproducing method according to claim 13, wherein the reproducing is performed at a higher speed than the recording. There is an effect that reproduction can be performed without causing any unusual movement.

According to the sixteenth aspect of the present invention,
13. A method of reproducing data recorded by the data recording method according to claim 12, wherein a predetermined track on a first recording surface of a recording disc having both surfaces as recording surfaces is directed inward or outward from a predetermined track. Moving the first and second reproducing heads to reproduce data for each track on the one recording surface using the first reproducing head;
The first and second reproducing heads are moved in a direction opposite to the moving direction, and data is recorded on each track on a second recording surface of the recording disk by using the second reproducing head. Is reproduced, the moving amount of the reproducing head of the double-sided recording disk can be made substantially constant, and there is an effect that unnecessary movement of the reproducing head can be reduced.

According to the seventeenth aspect of the present invention,
13. A method of reproducing data recorded by the data recording method according to claim 12, wherein a predetermined track on a first recording surface of a recording disc having both surfaces as recording surfaces is directed inward or outward from a predetermined track. Moving the first and second reproduction heads to reproduce data with respect to the discrete tracks on the one recording surface using the first reproduction head;
Thereafter, the first and second reproducing heads are moved in a direction opposite to the moving direction, and the second reproducing head is moved with respect to discrete tracks on a second recording surface of the recording disk. Since the data is reproduced by using the recording method, there is an effect that the disc recorded by the recording method capable of reducing the useless movement of the recording head as described above can be reproduced at high speed without causing the useless movement of the reproduction head.

According to the eighteenth aspect of the present invention,
17. The data reproducing method according to claim 16, wherein the reproducing is performed at a higher speed than the recording, so that the disk recorded by the recording method capable of reducing the useless movement of the recording head as described above can be reproduced at a high speed and a waste of the reproducing head. There is an effect that reproduction can be performed without causing any unusual movement.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a main configuration of a video signal recording unit of a television receiver according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a change in a signal for describing an operation of a video signal recording unit of a television receiver in an operation mode 1 based on the first embodiment.

FIG. 3 is a diagram illustrating a change in a signal for describing an operation of a video signal recording unit of a television receiver in an operation mode 1 based on the first embodiment.

FIG. 4 is a diagram illustrating a change in a signal for describing an operation of a video signal recording unit of the television receiver in an operation mode 2 based on the first embodiment.

FIG. 5 is a diagram illustrating a change in a signal for describing an operation of a video signal recording unit of the television receiver in an operation mode 2 based on the first embodiment.

FIG. 6 is a diagram illustrating a main configuration of a video signal recording unit of a television receiver according to a second embodiment of the present invention.

FIG. 7 is a diagram illustrating a main configuration of a video signal recording unit of a television receiver according to a second embodiment of the present invention.

FIG. 8 is a diagram illustrating a change in a signal for describing an operation of a video signal recording unit of a television receiver in an operation mode 3 based on the second embodiment.

FIG. 9 is a diagram illustrating the concept of zapping.

FIG. 10 is a diagram illustrating a change in a signal for describing an operation of a video signal recording unit of a television receiver in an operation mode 4 based on the second embodiment.

FIG. 11 is a diagram for explaining an operation of zapping connection executed in an operation mode 4 based on the second embodiment.

FIG. 12 is a diagram illustrating a main configuration of a video signal recording unit of a television receiver according to a third embodiment of the present invention.

FIG. 13 is a diagram illustrating a main configuration of a video signal recording unit of a television receiver according to a third embodiment of the present invention.

FIG. 14 is a diagram illustrating a change in a signal for describing an operation of a video signal recording unit of a television receiver in an operation mode 5 based on the third embodiment.

FIG. 15 is a diagram illustrating a change in a signal for describing an operation of a video signal recording unit of a television receiver in an operation mode 5 based on Embodiment 3;

FIG. 16 is a diagram illustrating a change in a signal for describing an operation of a video signal recording unit of a television receiver in an operation mode 6 based on the third embodiment.

FIG. 17 is a diagram illustrating a change in a signal for describing an operation of a video signal recording unit of a television receiver in an operation mode 6 based on the third embodiment.

FIG. 18 is a configuration diagram of a recording / reproducing device with a playback function according to a fourth embodiment of the present invention.

FIG. 19 is a configuration diagram of a recording / reproducing device with a playback function according to a fourth embodiment of the present invention.

FIG. 20 is a schematic perspective view of a recording / reproducing apparatus with a playback function according to the fourth embodiment, focusing on a magnetic disk portion;

FIG. 21 is a schematic perspective view centering on a magnetic disk portion of a recording / reproducing apparatus with a playback function according to a fourth embodiment.

FIG. 22 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring address of a ring buffer in the recording / reproducing apparatus with a playback function according to the fourth embodiment.

FIG. 23 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fourth embodiment.

FIG. 24 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring-shaped address of a ring buffer in the recording / reproducing apparatus with a playback function according to the fourth embodiment.

FIG. 25 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring address of a ring buffer of the recording / reproducing apparatus with a playback function according to the fourth embodiment.

FIG. 26 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring-shaped address of a ring buffer in the recording / reproducing apparatus with a playback function according to the fourth embodiment.

FIG. 27 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring address of a ring buffer in a recording / reproducing apparatus with a playback function according to the fourth embodiment.

FIG. 28 is a diagram showing a relationship between a track number of a double-sided recording type magnetic disk and a ring-shaped address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fourth embodiment.

FIG. 29 is a diagram showing a relationship between a track number of a double-sided recording type magnetic disk and a ring-shaped address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fourth embodiment.

FIG. 30 is a diagram showing a relationship between a track number of a double-sided recording type magnetic disk and a ring-shaped address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fourth embodiment.

FIG. 31 is a diagram showing a relationship between a track number of a double-sided recording type magnetic disk and a ring-shaped address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fourth embodiment.

FIG. 32 is a schematic perspective view of a recording / reproducing apparatus with a playback function according to the fifth embodiment, focusing on a magnetic disk portion;

FIG. 33 is a schematic perspective view of a recording / reproducing apparatus with a playback function according to the fifth embodiment, focusing on a magnetic disk portion;

FIG. 34 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring-shaped address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 35 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring address of a ring buffer in a recording / reproducing apparatus with a playback function according to the fifth embodiment.

FIG. 36 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring-shaped address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 37 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 38 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring address of a ring buffer in a recording / reproducing apparatus with a playback function according to the fifth embodiment.

FIG. 39 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring address of a ring buffer of the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 40 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring address of a ring buffer of the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 41 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 42 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 43 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring-shaped address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 44 is a diagram showing the relationship between the track number of the single-sided recording type magnetic disk and the ring address of the ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 45 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring address of a ring buffer in a recording / reproducing apparatus with a playback function according to the fifth embodiment.

FIG. 46 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring-shaped address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 47 is a diagram showing the relationship between the track number of a single-sided recording type magnetic disk and the ring address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 48 is a diagram illustrating a relationship between a track number of a single-sided recording type magnetic disk and a ring-shaped address of a ring buffer of the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 49 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring-shaped address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 50 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 51 is a diagram showing a relationship between a track number of a single-sided recording type magnetic disk and a ring-shaped address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 52 is a diagram showing the relationship between the track number of the double-sided recording type magnetic disk and the ring address of the ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 53 is a diagram showing the relationship between the track number of the double-sided recording type magnetic disk and the ring address of the ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 54 is a diagram showing a relationship between a track number of a double-sided recording type magnetic disk and a ring-shaped address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 55 is a diagram showing the relationship between the track number of the double-sided recording type magnetic disk and the ring address of the ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 56 is a diagram showing a relationship between a track number of a double-sided recording type magnetic disk and a ring address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 57 is a diagram showing a relationship between a track number of a double-sided recording type magnetic disk and a ring address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 58 is a diagram showing the relationship between the track number of the double-sided recording type magnetic disk and the ring address of the ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 59 is a diagram showing the relationship between the track number of the double-sided recording type magnetic disk and the ring address of the ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 60 is a diagram showing the relationship between the track number of the double-sided recording type magnetic disk and the ring address of the ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 61 is a diagram showing a relationship between a track number of a double-sided recording type magnetic disk and a ring address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 62 is a diagram showing the relationship between the track number of the double-sided recording type magnetic disk and the ring address of the ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 63 is a diagram showing the relationship between the track number of the double-sided recording type magnetic disk and the ring address of the ring buffer in the recording / reproducing apparatus with the playback function of the fifth embodiment.

FIG. 64 is a diagram showing the relationship between the track number of the double-sided recording type magnetic disk and the ring address of the ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 65 is a diagram showing a relationship between a track number of a double-sided recording type magnetic disk and a ring-shaped address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 66 is a diagram showing a relationship between a track number of a double-sided recording type magnetic disk and a ring-shaped address of a ring buffer in the recording / reproducing apparatus with the playback function according to the fifth embodiment.

FIG. 67 is a configuration diagram of a recording / reproducing apparatus with a playback function using a plurality of magnetic disks as Embodiment 6 of the present invention.

FIG. 68 is a configuration diagram of a recording / reproducing apparatus with a playback function using a plurality of magnetic disks as Embodiment 6 of the present invention.

FIG. 69 is a configuration diagram of a recording / reproducing device with a playback function using a plurality of magnetic disks as Embodiment 6 of the present invention.

FIG. 70 is a configuration diagram of a recording / reproducing apparatus with a playback function using a plurality of magnetic disks as Embodiment 6 of the present invention.

FIG. 71 is a configuration diagram of a recording / reproducing device with a playback function capable of multi-window display as a seventh embodiment of the present invention.

FIG. 72 is a configuration diagram of a recording / reproducing device with a playback function capable of multi-window display as a seventh embodiment of the present invention.

FIG. 73 is a configuration diagram of a recording / reproducing device with a playback function capable of multi-window display as a seventh embodiment of the present invention.

FIG. 74 is a configuration diagram of a recording / reproducing device with a playback function capable of multi-window display as a seventh embodiment of the present invention.

[Explanation of symbols]

 1, 1a,. . . , 1n tuners 2, 2a,. . . , 2n information compression circuits 3, 3a,. . . , 3n ring buffer 4 information decompression circuit 5, 7 selector 6 control circuit 7a first recording head 7b second recording head 8 main tuner 9 signal processing circuit 9a first reproduction head 9b second reproduction head 10 CRT display device 13 recording circuit 14 Magnetic disk 15 Spindle motor 16 Rotation axis 17a First recording head 17b Second recording head 19a First reproduction head 19b Second reproduction head 20 Hard disk drive 21 Recording head driving mechanism section 22 Reproduction head driving mechanism section 23 Control section 24 Reproduction circuit 30 ring-shaped recording medium 31 write pointer 32 read pointer 33 final position pointer 101, 201,. . . , M01 tuners 102, 202,. . . , M02 information compression circuits 103, 203,. . . , M03 ring buffer 120 playback device section 121 playback head selection section 122 playback circuit 123 information decompression section 124 multi-window synthesis circuit

Continuation of the front page (72) Inventor Eiichiro Naito 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (18)

[Claims] 1. A tuner for receiving a television video signal, a data storage unit for storing the video signal received by the tuner by a storage capacity thereof, and writing the video signal in the data storage unit in time series. A data storage unit including a pointer and a read pointer for reading the stored video signal; a reproduced video signal output from the data storage unit;
Selecting means for switching the output of the video signal received by the tuner and outputting one of the signals; and control means for controlling the operation of the data storage means and the selecting means in accordance with an external input. Television receiver. 2. The television receiver according to claim 1, wherein when a write instruction signal is input as said external input signal, a write pointer of said data storage means starts writing, and said external device receives said external input signal. When a reproduction instruction signal is inputted, a read pointer of the data storage means starts reading, and the selection means selects and outputs a reproduction video signal from the data storage means. Receiving machine. 3. The television receiver according to claim 2, wherein the read pointer of the data storage means keeps the write pointer during a period from when the write instruction signal is input to when the reproduction instruction signal is input. A television receiver, which reproduces and outputs, as a still image, a video signal output from the tuner when an instruction signal is input. 4. The television receiver according to claim 1, further comprising at least two tuners, wherein when a write instruction signal is input as the external input signal, the selection means receives the signal by one tuner. While the selected video signal is selected and output, the write pointer of the data storage means starts writing the video signal received by another tuner, and when the reproduction instruction signal is input as the external input signal, The read pointer of the data storage means starts reading and reproduces the video signal received by the one tuner, while the selection means selects and outputs the reproduced video signal from the data storage means. Television receiver. 5. The television receiver according to claim 1, further comprising a plurality of tuners, wherein, when a write instruction signal input as the external input signal is input, the selection means selects one of the plurality of tuners. While selecting and outputting the video signal received by one tuner, the write pointer of the data storage means starts writing the video signal received by the other tuner of the plurality, and switches the channel as the external input signal. When the instruction signal is input, the read pointer of the data storage means starts reading, and the video signal received by the other tuner among the plurality of tuners recorded until the channel switching signal is input. Is reproduced at a speed higher than the writing speed of the write pointer, and the selecting means reproduces the reproduced video from the data storage means. A television receiver which selects and outputs an image signal. 6. The television receiver according to claim 1, further comprising a plurality of tuners, wherein said data storage means includes a plurality of tuners.
The video signals received by the plurality of tuners specified by the external input signal are simultaneously recorded, and when a reproduction instruction signal is input as the external input signal, the data storage means stores the plurality of videos recorded in the data recording means. The signals are read out simultaneously, and the selecting means selects and outputs the plurality of video signals read out at the same time. When a channel determination instruction signal is input as an external input signal, the selecting means selects the plurality of reproduced video signals. A television receiver which selects and outputs only a reproduced video signal received and recorded by a tuner designated by the channel determination signal from among the signals. 7. The television receiver according to claim 1, further comprising a plurality of tuners, wherein said data storage means includes a plurality of tuners.
The video signals received by the plurality of tuners specified by the external input signal are simultaneously recorded, and when a reproduction instruction signal is input as the external input signal, the data storage means stores the plurality of videos recorded in the data recording means. A television receiver, wherein signals are read out simultaneously, and the selecting means selects and outputs the plurality of video signals read out simultaneously. 8. The television receiver according to claim 2, wherein when the reproduction instruction signal is input, the read pointer has an address of the read pointer as the write pointer. Until the address coincides with the address, the video signal is read out at a speed higher than the writing speed of the write pointer to reproduce the video signal at a high speed. A television receiver characterized by the above-mentioned. 9. The television receiver according to claim 1, wherein the data storage section of the data storage means comprises a ring buffer next to the highest address and following the lowest address. Television receiver. 10. A recording head for recording data on one recording surface of a recording disk, a reproducing head for reproducing recording data recorded on the recording surface, the recording head, and the reproducing head separately. A recording / reproducing apparatus with a playback function, comprising: a drive control means for driving the recording / reproducing apparatus. 11. A recording head is moved from a predetermined track of a recording disk having one side as a recording surface toward an inner circumference or an outer circumference to record data on intermittent tracks. A data recording method comprising: moving a recording head in an opposite direction, and recording data on the remaining tracks on which the recording was not performed. 12. A method according to claim 1, wherein the first and second recording heads are moved from a predetermined track on a first recording surface of the recording disk having both sides as recording surfaces toward an inner circumference or an outer circumference. Data is recorded on each track on the recording surface using the first recording head, and thereafter, the first and second recording heads are moved in a direction opposite to the moving direction, and the recording is performed. Recording data on each track on a second recording surface of a disk using the second recording head. 13. A method for reproducing data recorded by the data recording method according to claim 11, wherein a reproducing head is moved from a predetermined track of a recording disk having one surface as a recording surface toward an inner circumference or an outer circumference. Reproducing data on the intermittent tracks, moving the reproducing head in a direction opposite to the moving direction, and reproducing data on the remaining tracks on which the reproduction was not performed. Data reproduction method. 14. A method for reproducing data recorded by the data recording method according to claim 11, wherein a reproducing head is moved from a predetermined track of a recording disk having one surface as a recording surface toward an inner circumference or an outer circumference. The data is reproduced at intervals larger than the recording interval with respect to the intermittent tracks, and thereafter, the reproducing head is moved in the direction opposite to the moving direction, and the remaining interleaving which is not performed in the moving direction is performed. A data reproducing method characterized in that data is reproduced from a track at intervals larger than the recording interval. 15. The data reproducing method according to claim 13, wherein the reproducing is performed at a higher speed than the recording. 16. A method for reproducing data recorded by the data recording method according to claim 12, wherein a predetermined track on a first recording surface of a recording disk having both surfaces as recording surfaces is directed inward or outward from a predetermined track. Towards the first
And moving the second reproducing head to reproduce data on each track on the one recording surface by using the first reproducing head, and thereafter, moving the second reproducing head in a direction opposite to the moving direction. A data recording method comprising: moving first and second reproducing heads; and reproducing data from each track on a second recording surface of the recording disk by using the second reproducing head. . 17. A method for reproducing data recorded by the data recording method according to claim 12, wherein a predetermined track on a first recording surface of a recording disc having both surfaces as recording surfaces is directed inward or outward. Towards the first
And moving the second reproducing head to reproduce data using the first reproducing head with respect to the discrete track on the one recording surface, and thereafter, moving the data in the direction opposite to the moving direction. Data is reproduced by moving the first and second reproducing heads and using the second reproducing head for a discrete track on a second recording surface of the recording disk. Recording method. 18. The data reproducing method according to claim 16, wherein the reproducing is performed at a higher speed than the recording.