JP3507473B2 - Recording / playback device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus, and more particularly to recording / reproducing image signals.

[0002]

2. Description of the Related Art Conventionally, in a domestic VTR, recording and reproduction of television signals are performed under the concept of time shift. Specific examples of the time shift include absence recording by setting a timer, and a one-touch timer that is convenient when the user is watching TV.

As a well-known general example, an outline of the absence recording by timer setting will be described. This is to receive and record a broadcast program from a desired TV station at a desired time by a VTR device including a TV tuner, a TV signal recording / reproducing device, and timer means for controlling them. As a result, the time when a certain program is broadcast and the time when the program is viewed can be shifted.

[0004]

However, in order to set the one-touch timer, the video tape capable of recording the television signal must be mounted in the VTR device in advance, and it is necessary to suddenly sit in the middle position. There was a problem that if it occurred, it would not be in time. When resuming viewing, if the recorded program has not ended, you must select either restarting the viewing from the middle of the program or waiting until the program ends. did not become. Therefore, in either case, it was not preferable to the viewer.

Furthermore, there is a case where it is desired to confirm again the scene currently being viewed. In such a case, a conventional VTR can be used, but it is not possible to record a television signal during the reverse playback, so if the reverse playback is performed during the broadcast of the program, that portion will be recorded later. There was the inconvenience that it became impossible to watch. Therefore, in order to perform reverse playback without such inconvenience, it was necessary to complete the recording of the program being viewed, rewind to the desired location, and start reverse playback. Was very difficult.

The present invention has been made in consideration of the above-mentioned problems.
It is possible to easily start recording for sitting on the table without making the device ready for recording in advance.
It is an object of the present invention to allow a viewer to easily recognize a viewing interruption position.

[0007]

A recording / reproducing apparatus of the present invention comprises a memory means capable of simultaneously recording and reproducing a moving image signal, and a recording and reproducing operation of a moving image signal recorded in the memory means. Manual instruction means for instructing, and recording the moving image signal in the memory means in response to a first instruction by the manual instruction means, and also an image signal of one screen in response to the first instruction as a still image. The moving image signal recorded in response to the first instruction is reproduced from the memory means while continuing the recording of the moving image signal in the memory means in response to the second instruction from the manual instruction means. Memory control means for controlling the recording / reproducing operation of the memory means, and display means for displaying an image according to the image signal reproduced from the memory means. The memory control means outputs the still image for display in response to the first instruction, converts the still image into the still image in response to the second instruction, and records the still image in response to the first instruction. The reproducing operation of the memory means is controlled so as to output a moving image signal for display. In addition, another feature of the present invention is that
The memory control means includes a receiving means for receiving a moving image signal and a compressing means for compressing the information amount of the received moving image signal, and the memory control means writes the compressed moving image signal in the memory means. It is in. Another feature of the present invention is that the expansion means expands the information amount of the moving picture signal reproduced by the memory means, and the output for outputting the moving picture signal expanded by the expansion means to an external monitor. And means.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the configuration and operation of a first embodiment of the present invention will be described with reference to the configuration diagram of FIG. As shown in FIG. 1, an analog input video signal provided from the AV receiver 11 or the like is received via the video input terminal 12, and an audio signal is received from the audio input terminal 14.

The analog video and audio signals input from the input terminals 12 and 14 are converted into digital signals by the A / D converters 13 and 15, respectively. Then, after that, the amount of data is respectively reduced by the image compressor 31 and the audio compressor 30 for compressing the data. Next, the synthesizer 16 synthesizes the video data and the audio data into a data block for each predetermined unit as composite data of video and audio, which is once written in the buffer memory 17. In this embodiment, as the buffer memory 17, a memory element capable of simultaneously accessing two or more ports is used.

The data compressor used here is
The video information is based on DCT or the like. For example, simple fixed-length coding may be used in addition to the JPEG-recommended still image processing for each screen or the MPEG-recommended advanced variable-length coding. For example, in the case of voice information, coding in consideration of auditory characteristics, adaptive transform coding based on the theory of entropy coding, and 32 to 102
What has been examined in MPEG such as band division coding of a method of subdividing into four frequency bands and analyzing a music signal in each band shows good compression characteristics at present.

By the way, JPEG and MPEG are groups for studying international standardization of images, and JPEG is J.
oint Photographic Expert
Abbreviation for Group. In addition, MPEG is Mobi
ng Picture Expert Group, which stands for still images and moving images. Details of such image compression are introduced on pages 1 to 32 of the special edition of Nikkei New Media March 4, 1991.

After that, the data read from the above-mentioned buffer memory 17 is given to the separator 18 under a predetermined control, and is separated again into a video signal and an audio signal. Then, these signals are given to the image decompressor 33 and the audio decompressor 32, respectively, and decoded into the amount of information before compression. The decoded data is converted into analog signals by the D / A converters 19 and 22, and is output from the output terminals 20 and 23 as a video signal and an audio signal with an arbitrary time delay. By supplying this output signal to the video monitor 21 and the speaker 24, respectively, the video and audio of a desired broadcast program are reproduced.

Such predetermined control is performed mainly by the system controller 28, and the write controller 25 and the read controller 26 instructed by the system controller 28 control the above-mentioned buffer memory 17 and synthesis. The operations of the container 16, the separator 18, and the like are controlled.

When the viewing of the television broadcast is interrupted, the pause instruction information is input through the key input unit 29. The inputted pause instruction information is given to the system controller 28. When the pause instruction information is given, the buffer memory 17 starts recording the AV information, repeatedly reads the image information corresponding to the leading screen of the write information, and displays it as a still image.

When the television broadcast can be viewed again, instruction information for canceling the pause state is input from the key input unit 29. When the pause state cancellation instruction information is given to the system controller 28, the reproduction process of the information recorded in the buffer memory 17 is started.

The operation of recording in the buffer memory 17 is continued from the time when the pause instruction is issued, and when the memory capacity is fully used up by using all the storage capacity of the buffer memory 17, or otherwise. When an instruction to end viewing is given to the system controller 28 via the key input unit 29, the information recording operation is started and ended.

Next, the execution procedure of the reserved recording process controlled based on the timer setting will be sequentially described with reference to FIGS. 2 and 3. FIG. 2 shows the passage of time from time T0 to time T6, and FIG. 3 shows the state of the buffer memory 17 at each time point from time T1 to time T6, distinguishing between unrecorded, recorded, and reproduced.

In FIG. 2, time T0 is the initial state. Here, if a pause instruction is input to the system controller 28 from the key input unit 29 at the timing of time T1, recording is started from time T1. At this time, the state of the buffer memory 17 is all unrecorded state (indicated by φ) immediately after the start, as shown at T1 in FIG.
Is.

At time T2 after the time t1 has elapsed from the time T1, the memory capacity of the portion corresponding to the time t1 has been recorded and the rest is in the unrecorded state φ. In the information storage / playback apparatus of the first embodiment, while continuing the recording in this manner, the still screen at the time when the pause instruction information is input is played back.

Next, when the pause state is released at time T3, the reproduction of the recorded information is started. For example, as shown at time T3 in FIG. 3, the memory state at the time of starting the reproduction has a distribution between the recorded area and the unrecorded memory area, and the reproduction area does not exist yet. Next, at time T4 when time t2 has elapsed from time T3, a memory area that has been reproduced for time t2 has already occurred.

At the same time, recording corresponding to time t2 is in progress compared to time T3. Since the first embodiment uses the memory device capable of simultaneously accessing two or more ports,
Such a simultaneous recording / reproducing process can be realized.

In this state, the simultaneous recording / reproducing process is continued,
When the memory full state is reached, the recording process ends. In this case, the reproduction time up to this point is t3, and the remaining reproducible time is T3-T1. When the recording process ends,
After that, only the reproduction process is performed. When the end of the reproduction process is instructed at time T6, as shown at T6 in the figure, the unrecorded portion φ and the recorded portion corresponding to the pause execution period T3-T1 are left. In the present embodiment, data is not erased during the reproduction process, so that the reproduction can be repeated any number of times thereafter.

It is also possible to change the reproduction operation described above. When changed, the time interval between time T3 and time T6 changes according to the reproduction speed. In this case, the reproduction speed can be freely set as long as the reproduction (read) address does not exceed the recording (write) address.

As an example, it has a high-speed reproduction mode, and when this instruction is input from the key input unit 29, this is detected and the read address is counted faster than the standard speed (jumping is specified for every several addresses). FIG. 4 shows a flowchart for performing the processing.

The operation flowchart of FIG. 4 shows the control of the system controller 28.
It consists of five processing steps. In the following description, each processing step is described as S01 to S15.

First, in S01, the key input section 29 is operated to operate the AV receiver 1 via the system controller 28.
AV information (audio information and video information) from the speaker 1
The AV signal path is set so as to be reproduced by the monitor 4 and the monitor 21. Next, in S02, it is monitored whether or not a pause instruction is input.
03-S07.

In step S03, the reproduction start address is initialized in the read controller 26, and in step S04, the recording start address is initialized in the write controller 25. In S05, recording of information supplied from the data synthesizer 16 is started. Then, when the information recording is started, the write address of the memory 17 is sequentially counted up in S06, and the write address is monitored in S07.
The process is jumped to and recording is stopped.

Next, in S08, it is determined whether or not the pause is OFF. If the pause is OFF, the flow advances to S09 to count up the reproduction address. If the address has a margin, next, the process proceeds to S10, it is determined whether or not there is a fast-forward instruction, and if there is a fast-forward instruction, the reproduction address is counted up at high speed in S11. When it is determined that there is no fast-forward instruction, this fast-forward reproduction process S11 is bypassed.

On the other hand, when it is determined in S08 that there is no pause cancellation instruction, the reproduction processes S09 to S11 are bypassed and the process proceeds to S12. In S12, the reproduction end instruction and the recording stop instruction are monitored, and if there are these instructions, the process proceeds to S13. If the reproduction end instruction and the recording stop instruction have not been issued, the process returns to S06 and the above-described processing is repeated.

In S13, the recording operation is stopped in response to a reproduction end instruction or a capacity over condition. Next, in S14, the size relationship between the reproduction address (A _pb ) and the recording address (A _rec ) is compared. In this case, if the reproduction address (A _pb ) ≦ recording address (A _rec ), it means that the area is a recorded area, and the process returns to S08 to continue the reproduction operation.

If the reproduction address (A _pb )> the recording address (A _rec ), it means that the unrecorded area is entered.
The process proceeds to step S15 to stop the reproducing operation and prevent entry into the unrecorded area.

Since the information storage / reproducing apparatus of the first embodiment records / reproduces information in this manner, as shown in the operation conceptual diagram of FIG. For this reason, when a TV pause on instruction is given,
The freeze display state in which the moving image is temporarily stopped is displayed, and the screen at the time when the TV pause-on instruction is issued is displayed still. Also, the recording of the television broadcast is started from the time when the TV pause-on instruction is issued.

Then, when the viewer returns from the middle stage and gives an instruction to turn off the TV pause, the reproduction of the television broadcast being watched before the middle stage is started. Moreover, since this reproduction can be performed from the position interrupted by Nakaza, the viewer can consistently watch the television broadcast despite the fact that the viewer is in Nakaza.

Next, a second embodiment of the information storage / reproduction device of the present invention will be described. In the second embodiment, when the reverse reproduction instruction information is given from the key input unit 29, it operates as described below. That is, when the reverse reproduction instruction information is given, this is input to the system controller 28.

When the system controller 28 receives the reverse reproduction instruction information, it continues the recording of the television signal and starts the reproduction processing in the direction opposite to the time axis.
This is a subtraction from the current address value in the opposite direction to the address count up of the recording process described above.
In this way, the reverse rotation reproduction is performed, and when the desired position is reached, the normal rotation reproduction instruction is input from the key input unit 29 to the system controller 28 instead of the reverse rotation reproduction instruction.

Thereafter, when the television signal becomes available for viewing again, the viewer inputs a pause state release instruction from the key input unit 29 to the system controller 28 to start the reproduction process. The recording process is
In this case as well, the initial setting is still continued, and when the memory full state is reached by using all the memory capacity or otherwise, the key input unit 29 instructs the system controller 28 to end the viewing. The recording ends when the input is made.

Next, the recording / reproducing execution procedure of the information storage / reproducing apparatus in the second embodiment will be sequentially described with reference to FIGS. 6 and 7. FIG. 6 shows the passage of time from time T0 to time T6, and FIG. 7 shows the state of the buffer memory 17 at each time point from time T1 to time T6, distinguishing between unrecorded, recorded, and reproduced.

First, for initialization, recording of a television signal is started at T1. In this case as well, the memory is initially in the unrecorded state (indicated by φ). Then, when a review instruction is input from the key input unit 29 to the system controller 28 at time T2 after a lapse of time t1 from time T1, reverse playback is started from this time.

Assuming that the time interval from time T1 to time T2 is t1, the television signal of the portion corresponding to time t1 is recorded at this time. In the state of the buffer memory 17 at this time, as shown at T2 in FIG. 7, the portion corresponding to the time t1 is recorded and the rest is in the unrecorded state φ.

At time T3 after the lapse of time t2, the memory area corresponding to the time t2 is further recorded, and at the same time, the area corresponding to the time t2 period is reproduced in the reverse direction. In this way, the reproduction process is performed in the reverse direction from the time when the review instruction is input while continuing the recording, and the desired screen search is executed. Then, if the desired screen can be retrieved, the review instruction is canceled.

The time when the review instruction is canceled is T3,
From here, the reproduction of the recorded information in the forward direction is started. The state of the buffer memory 17 at the start of this forward reproduction is shown at T3 in FIG. As is clear from T3 in FIG. 7, it is noted that the address is advanced in the opposite directions of recording and reproduction for the time period t2 from the start of the review.

Next, at a time T4 when some time has elapsed from the time T3, the memory area becomes a recorded area, a reproduced area, a recorded area, and an unrecorded area in order from the smallest address, and the memory capacity Is illustrated as a state where there is still room. On the other hand, at time T5, only time t3 has elapsed from time T3, and the state is illustrated as a state in which information is stored in the entire capacity of the buffer memory 17.

In this embodiment, the recording operation is set to be terminated when information is stored in the entire capacity of the buffer memory 17. Further, when an instruction to end the reproducing operation is sent from the key input unit 29 to the system controller 28 at time T6 when the buffer memory 17 has a sufficient capacity,
The recording is set to end at the same time. Also in the second embodiment, since the memory element capable of simultaneously accessing a plurality of ports of two or more is used, such a simultaneous recording / reproducing process can be realized. Also in this case, since the data is not erased during the reproduction process, the data can be reproduced as many times as necessary after this.

The reproduction processing described above can be changed. When changed, the time interval between time T2 and time T6 changes according to the reproduction speed. In this case, the reproduction speed can be freely set as long as the reproduction (read) address does not exceed the recording (write) address.

As an example, it has a high-speed reproduction mode, and when this instruction is input from the key input unit 29, this is detected and the read address is counted faster than the standard speed (jumping is specified for every several addresses). FIG. 8 shows a flow chart for performing the processing.

The operation flowchart of FIG. 8 shows the control of the system controller 28.
It consists of four processing steps. In the following description, each processing step is described as S01 to S14. First, in S01, the key input unit 29 is operated to receive the AV information (audio information and video information) from the AV receiver 11 via the system controller 28 and the speaker 24 and the monitor 21.
The AV signal path is set so as to be reproduced by and.

Next, in S02, the read controller 26 is initialized with the reproduction start address, and in S03.
The recording start address is initialized in the write controller 25. Further, in S04, recording of information supplied from the data synthesizer 16 is started. When the information recording is started, the write address of the memory 17 is sequentially counted up in S05, the write address is monitored in S06, and if the capacity is exceeded, the process jumps to S13 and the recording is stopped.

Next, in S07, it is determined whether or not there is a review instruction, and if there is a review instruction, the operation proceeds to S08 to count down the reproduction address. Next, S0
If there is no forward playback instruction in step 9, forward playback processing is performed in S10.
Bypass, and if there is a forward reproduction instruction, the reproduction address is counted up.

On the other hand, when it is determined in S07 that there is no review instruction, the reproduction processes S08 to S10 are bypassed and the process proceeds to S11. In S11, the instruction to end recording or reproduction is monitored, and if there is such instruction, the process proceeds to S12. If the reproduction end instruction and the recording stop instruction have not been issued, the process returns to S05 and the above-described processing is repeated.

In S12, the recording operation is stopped in response to a reproduction end instruction or a capacity over condition. Next, in S13, the size relationship between the reproduction address (A _pb ) and the recording address (A _rec ) is compared. In this case, if the reproduction address (A _pb ) ≦ recording address (A _rec ), it means that the area is a recorded area, and the process returns to S08 to continue the reproduction operation.

If the reproduction address (A _pb )> the recording address (A _rec ), it means that the unrecorded area has been entered.
Proceeding to S14, the reproducing operation is stopped to prevent the reproducing portion from entering the unrecorded area.

Since the information recording / reproducing apparatus of the second embodiment records / reproduces information in this manner, as shown in the operation conceptual diagram of FIG. 9, for example, the screen is redisplayed while watching a television broadcast. When a review instruction is given for confirmation, reverse reproduction is started. Then, when the reproduction instruction is given after the reverse reproduction is watched for a desired period, the reproduction of the television broadcast which is being viewed before the reverse reproduction is started is started. Moreover, since this reproduction can be performed from the position where the reverse reproduction is interrupted, the viewer can consistently watch the television broadcast even though the reverse reproduction is performed while watching the television broadcast. It is possible.

[0053]

As described above, according to the present invention,
Since the moving image signal recorded in response to the first instruction is reproduced while the recording of the moving image signal in the memory means is continued in response to the second instruction, the moving images recorded after the first instruction are reproduced. The image signal can be reproduced by the second instruction. Therefore, the user can check the images recorded during the middle stage or the like without complicated operation. Further, since the image signal of one screen corresponding to the first instruction is displayed as a still image, it is possible to clearly show the screen at the time when the first instruction is given due to the middle seat, etc. Images recorded after the instruction of 2 can be displayed clearly and continuously.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an information storage / reproduction device according to an embodiment of the present invention.

FIG. 2 is a time chart for explaining the operation of the information storage / reproduction device in the first embodiment of the present invention.

FIG. 3 is an explanatory diagram of a memory area showing a usage state of the memory of the first embodiment.

FIG. 4 is a flowchart for explaining a processing procedure of the first embodiment.

FIG. 5 is an operation conceptual diagram of the information storage / reproduction device in the first embodiment.

FIG. 6 is a time chart for explaining the operation of the information storage / reproduction device in the second example of the present invention.

FIG. 7 is an explanatory diagram of a memory area showing a usage state of the memory according to the second embodiment.

FIG. 8 is a flowchart for explaining the processing procedure of the second embodiment.

FIG. 9 is an operation conceptual diagram of the information storage / reproduction device in the second embodiment.

[Explanation of symbols]

10 Display 11 AV receiver 13 A / D converter 15 A / D converter 16 synthesizer 17 buffer memory 18 separator 19 D / A converter 25 Write Controller 26 Readout controller 27 Timer section 28 system controller 29 Key input section 30 audio compressor 31 image compressor 32 voice expander 33 Image decompressor

Claims (3)

(57) [Claims] 1. A memory means capable of simultaneously recording and reproducing a moving image signal, a manual instruction means for instructing a recording and reproducing operation of the moving image signal recorded in the memory means, and the manual instruction. The moving image signal is recorded in the memory means in response to a first instruction from the first means.
The image signal of one screen according to the instruction of 1 is reproduced as a still image, and the recording of the moving image signal to the memory means is continued according to the second instruction of the manual instruction means, and the first instruction is accepted. Memory control means for controlling the recording / reproducing operation of the memory means so as to reproduce the moving image signal recorded as described above from the memory means, and display means for displaying an image according to the image signal reproduced from the memory means. The memory control means outputs the still image for display in response to the first instruction, converts the still image into the still image in response to the second instruction, and responds to the first instruction in response to the first instruction. A recording / reproducing apparatus, characterized in that the reproducing operation of the memory means is controlled so as to output the recorded moving image signal for display. 2. A receiving means for receiving a moving image signal, and a compressing means for compressing an information amount of the received moving image signal, wherein the memory control means stores the compressed moving image signal in the memory. The recording / reproducing apparatus according to claim 1, wherein the recording / reproducing apparatus writes the data in the means. 3. An expansion means for expanding the information amount of the moving picture signal reproduced by the memory means, and an output means for outputting the moving picture signal expanded by the expansion means to an external monitor. The recording / reproducing apparatus according to claim 2.