JP2001292388A - Reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem such that data recorded in a recording medium is finished to be viewed, it is not necessary to be stored when delayed reproduction is performed and a large amount of unnecessary pieces of data are recorded on a device by performing such delayed reproduction for many times. SOLUTION: This reproducing device is provided with an input means to input a video or voice signal, a memory to record inputted information, a writing control part to control recording to the memory, a reading control part to control reading from the memory and an output part to output the information read from the memory and the problem is solved by reading the information, outputting it to the output part in the reading control part and deleting the read information from the memory.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus for inputting and displaying an image and displaying and reproducing the image, and more particularly to a delayed reproduction for making a time for inputting an image different from a reproducing time.

[0002]

2. Description of the Related Art Generally, in a TV broadcast or the like, when the user cannot view the program during the broadcast time of the program he / she wants to view because of being out of the office or the like, he or she makes a scheduled recording on a video tape or the like. A technique of playing and viewing at a good time is used.

[0003] Such reserved recording is also used when it is not possible to start viewing before the program starts. For example,
If you want to watch the program from 21:00 to 23:00,
If there is a possibility that the person will not be able to return home by this time, the scheduled recording of this program is performed. Recording is started at 21:00 by the reservation timer. Thereafter, if the user returns home a little later, for example, at 21:15, the user can watch the program from 21:15, but from 21:15, the user misses the first 15 minutes. On the other hand, when the user wants to watch the program from the beginning, he has to wait until the recording is completed, and there is a problem that he can watch the program only at 23:00.

As a method for solving such a problem, Japanese Patent Application Laid-Open No. Hei 8-79685 discloses a technique capable of reproducing a program recorded during recording. By using such a technique, reproduction can be performed without waiting for the end of recording. Japanese Patent Application Laid-Open No. Hei 10-21537 also discloses that playback can be performed during recording,
A technique is disclosed in which fast-forward playback is performed by skipping playback so that playback is performed while shortening the playback time, and the actual broadcast is viewed when catching up with the currently recorded broadcast.

[0005]

With the above-mentioned prior art, a program being recorded can be reproduced during recording, so that a desired program can be viewed at a staggered time without wasting time. be able to. As a result, such a process is a so-called delayed reproduction process in which the recording is not performed but the time is shifted.

When such delayed playback is performed, the data recorded on the recording medium has already been viewed and does not need to be stored. By performing such delayed reproduction many times, there is a problem that a large amount of unnecessary data is recorded on the apparatus.

[0007]

According to a first aspect of the present invention, an input means for inputting a video or audio signal, a memory for recording input information, a write control unit for controlling recording on a memory, and a memory A read control unit that controls reading from a memory, and an output unit that outputs information read from a memory, wherein the read control unit reads information and outputs the information to an output unit. The above problem is solved by erasing the read information.

According to the second aspect of the present invention, an input means for inputting a video or audio signal, a memory for recording input information, and an attribute for separating attribute data relating to the video or audio signal from the input information A reproducing device comprising: a reading unit; a writing control unit that controls recording in a memory; a reading control unit that controls reading from the memory; and an output unit that outputs information read from the memory, wherein the attribute reading unit By this, when the read attribute is a predetermined attribute, in the read control unit,
The above object is achieved by reading information and outputting the read information to an output unit, and erasing the information read from the memory.

According to the third aspect of the present invention, the write control unit and the read control unit manage the independent write / read addresses and simultaneously write and read different addresses on the memory to solve the above-mentioned problem. Resolve.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an apparatus and a delay reproduction apparatus according to an embodiment of the present invention. In FIG.
Reference numeral 1 denotes an AV input / demodulation device. This AV input / demodulation device inputs video and audio data. The input signal is generally subjected to compression or modulation, and demodulation is performed here. The demodulated signal is divided into S1 and S2,
S1 is input to a signal output system, and S2 is input to a signal recording system and a process of reading an attribute of a signal.

The flow of data shown in S1 shows the flow of processing when input data is displayed as it is.
The data is separated into an audio signal, a video signal, and a data signal by the reproduction signal distributor 10 (S10), and is demodulated by the audio demodulation unit 11, the video demodulation unit 12, and the data demodulation unit 13, respectively (S11). The control signal separated by the reproduction signal distributor 10 is input to the output control unit 14, and the data demodulated by the audio demodulation unit 11, the video demodulation unit 12, and the data demodulation unit 13 are converted into data.
The signals are output to the audio output unit 15, the display unit 16, the monitor output unit 17, and the like. It is also possible to communicate outside using the communication output unit 18. The monitor output here is not actual video data, but a command of the device or a message from the device, and may be displayed by being superimposed on normal video data.

Among the data shown in S2, data relating to the attribute of the input data is read by the attribute reading unit 3 and input to the system controller 8 which manages the entire data.

The other data is encoded by the encoding processor 2, formatted for temporary recording by the signal synthesizer 4, stored in the buffer memory 5, and written to the main memory 7 through the write controller 6. Main memory 7
Is read out by the read control unit 9, read out to the buffer memory 5, and then input to the reproduction signal distributor 10, and the same processing as in S <b> 1 is performed.

Next, the processing in the main memory 7, the write control unit 6, the read control unit 9, and the buffer memory 5 when performing the delay reproduction in the delay reproduction apparatus of the present invention will be described. FIG. 2 shows this state. In the example of FIG. 2, similarly to the above-described example, when watching the program from 21:00 to 23:00, it is an example in which the program is viewed from 21:15 with a delay of 15 minutes.

FIG. 2A shows an example of a case where reproduction is performed at the same speed as during recording. When the broadcast is started at 21:00, data is sequentially recorded in the buffer memory 5. In this example, the recording control is performed every 15 minutes for convenience of the drawing, but the recording control is actually performed in a shorter time unit. When the recording from 21:00 to 15 minutes, that is, the data from 21:00 to 21:15 is recorded in the buffer memory 5, the writing control unit 6 stores the data from 21:00 to 21:15 in the buffer memory into the main memory 7. At a predetermined address, here, address N (a).

Thereafter, at 21:15, similarly, 21:15 to 2
The data broadcast at 1:30 is recorded in the buffer memory 5 and then written to the main memory at address N (b) (the address following the last address written last time). At the same time 21:15, the read control unit reads data from 21:00 to 21:15 from the main memory based on the address N (a). Here, the amount to be read at a time may be determined based on the size of the buffer memory 5 or the like, but here, the data is 15 minutes. The read data is transferred from the buffer memory 5 to the reproduction signal distributor 10.
Sent to and displayed. Therefore, the program broadcasted from 21:15 to 21:00 can be viewed. Thus, reading from the main memory is performed simultaneously with writing to the main memory.

The data read from the main memory 7 is deleted at any time. Specifically, the reproduction address N
This is realized by erasing (a) or writing an area blank signal in the read area. In such control, the system controller 8 manages the address of the main memory 7, and the write controller 6 and the read controller 9
This is done by controlling

The system controller 8 has a main memory 7
, The recording position and the reproduction position are managed independently of each other. FIG. 3 shows this state. FIG. 3 shows the management state of the address of the main memory in the system controller at 21:30 (at the end of the processing at 21:15). As shown in the figure, the address indicating the recording position is:
The position (eg, N (c)) where the video is recorded from the next 21:30 is shown. Further, the address indicating the reproduction position indicates N (b). As of 21:30, playback is 21:00
This is because only what was broadcast at 21:15 is being reproduced. When the address indicating the reproduction position indicates N (b) in this manner, the data before N (b) has been erased as described above.

As described above, erasing data as soon as it is reproduced has the effect that the memory can be used effectively because the data is reproduced and unnecessary data is automatically deleted. With it, there is another effect.

For example, in a case where the author does not want to record a program or the like on a removable recording medium or in a case where the author does not want to reproduce the program or the like many times from a once recorded recording medium. Even so, by performing the processing according to the invention of the present application, the data is erased as soon as it is reproduced, so that it is possible to perform processing not against the intention of the author.

Another embodiment will be described below. For example, the author's intention described above may be added to program data and broadcast. For example, when such an intention of the author is input as a code along with the program data, the code is input to the attribute reading unit 3 after being input by the AV input / demodulation device 1 in FIG. As described above, the data reproduced once is immediately deleted. Also, if the program has no intention of the author and has no problem in recording, the program may be configured without being deleted even after being read from the main memory as in the conventional technique. Good.

In this example, an example is shown in which the main memory can have two pieces of position information of recording and reproduction.
For example, when a main head has a reproducing head and a recording head for writing, and the two heads are controlled by the same head arm, two pieces of position information cannot be held. By using the buffer memory 5, recording and reproduction can be performed simultaneously.

In the example shown in FIG. 2B, as shown in the section of the prior art, the recorded data is reproduced in a shorter time than the recording time to catch up with the recording. As shown in FIG. 2 (b), this is an example in which a program from 21:00 to 23:00 is recorded and viewing is started at 21:15 as in the example of FIG. 2 (a). The difference from the example of FIG.
The 15-minute video recorded from 00 to 21:15 is 1 here.
Plays in less than 5 minutes. In this way, the control for varying the reproduction speed is performed by the system controller 8. A reproduction speed variable instruction from the user is performed from the input / output processing unit 19, the instruction is input to the system controller, and the write control unit 6 is controlled. By varying the writing and reading speeds in the read control unit 9 and controlling the output control unit 14, the speed during reproduction can be varied.

In the example of FIG. 2B, 60 minutes of data recorded between 21:00 and 22:00 are reproduced in 45 minutes between 21:15 and 22:00. In this way, when the time is shortened at the time of reproduction, a frame is dropped (so-called frame break) in the case of a video, and an averaging of the sound generation time, compression / expansion of the sound, and tone adjustment are performed in the case of the sound. With this processing, it is possible to hear the sound with a sound close to normal even during the special reproduction.

In the example of FIG. 2B, at 22:00, the reproduction position address and the recording position address of the main memory managed by the system controller match. As described above, after the time when the reproduction is started to be recorded, the recording is not performed, and a signal is input to and output from the reproduction signal distributor 10 in accordance with the flow of S1 shown in FIG.

In another embodiment, the difference between the recording position and the reproduction position is obtained based on the reproduction position address and the recording position address of the main memory managed by the system controller 8, and the time is further converted to time. Thus, it is also possible to display the currently recorded time (the same as the actual time), the currently recorded time of the currently reproduced video, and the difference between them.

[0027]

According to the present invention, a memory can be effectively used to reproduce and automatically delete unnecessary data, and a recording medium or the like to which a writer can attach / detach a program or the like can be provided. Even if it is not desired to be recorded on a recording medium or if it is not desired to be reproduced many times from a recording medium that has been recorded once, it is possible to perform processing that does not violate the intention of the author .

[Brief description of the drawings]

FIG.

FIG. 2

FIG. 3

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 AV input / demodulation device 2 encoding processing unit 3 attribute reading unit 4 signal synthesizing unit 5 buffer memory 6 write control unit 7 main memory 8 system controller 9 read control unit 10 playback signal distributor 11 audio demodulation unit 12 video demodulation unit 13 Data demodulation unit 14 Output control unit 15 Audio output unit 16 Display unit 17 Monitor output unit 18 Communication output unit 19 Input / output processing unit

Claims (3)

[Claims] 1. An input means for inputting a video or audio signal, a memory for recording input information, a write control unit for controlling recording in a memory, a read control unit for controlling reading from a memory, and a read from a memory A reproducing apparatus comprising an output unit that outputs the read information, wherein the read control unit reads the information and outputs the read information to the output unit, and erases the information read from the memory. 2. An input means for inputting a video or audio signal, a memory for recording input information, an attribute reading means for separating attribute data relating to the video or audio signal from the input information, and recording in the memory A read control unit that controls reading from the memory, and an output unit that outputs information read from the memory, wherein the attribute read by the attribute reading unit is If the attribute is a predetermined attribute, the read control unit reads information and outputs the read information to an output unit, and erases the information read from the memory. 3. The write control unit and the read control unit manage independent write / read addresses and simultaneously perform writing and reading of different addresses on a memory. Playback device.