JPH09247629A - Receiver provided with video reproducing means - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the receiver with a reproduction means capable of video image reproduction for a long time at a minimum cost by taking matching between viewing and reproduction in a way that the reproduced image is viewed the same as the lapse of a broadcast time so that an unpleasant sense is not caused when the reproduced video image is watched at the same time of an existing broadcast or after the broadcast is finished thereby viewing the existing broadcast succeedingly in a natural lapse after the end of reproduction without looking over the existing broadcast when the viewer leaves it seat for a short time during watching. SOLUTION: Existing broadcast program data are updated sequentially with new data and stored in a playback area of a video memory, and when reproduction is started, video data for a prescribed preceding time are stored. Image data of the existing broadcast program from the reproduction start time are stored in a run-after area. At reproduction image data P1-P5 having been stored in the playback area are displayed sequentially on a monitor and then image data are sequentially reproduced from image data O6 of the existing broadcast program stored in the run-after area. When the reproduced image catches up with the existing broadcast program data, the video image is switched and the existing broadcast program is displayed on the monitor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image receiving device provided with a video reproducing means capable of accumulating a predetermined amount of video and instantly reproducing it. , A video playback unit that compresses the time axis of the image data of the current broadcast that has been accumulated up to the elapsed time to achieve time alignment so that it does not feel a time discontinuity with the input video of the current broadcast, and plays it back Image receiving device.

[0002]

2. Description of the Related Art Heretofore, there has been proposed a video playback apparatus which stores a video for a certain period of time going back from the current video being received and reproduces the stored image data according to an operator's instruction. In this video playback device, only the playback video is displayed on the screen during playback of the recorded video, so that the current broadcast cannot be viewed while the playback image is being displayed on the monitor. In another video playback device, as shown in FIG. 6, a type has been proposed in which the current broadcast and the reproduced image are displayed on two screens and can be viewed at the same time. However, the current broadcast and the reproduced image are displayed on the two screens. Since the contents are displayed, it is difficult to grasp the contents of the current broadcast screen when paying attention to the contents of the reproduced image, and it is difficult to grasp the contents of the reproduction image screen when focusing on the contents of the current broadcast.
Further, since the capacity of the memory to be stored is a fixed amount, when the user leaves the place for a short time while watching the screen, it is not possible to store the images for the separated time, and the current broadcast may be missed. In such a case, the problem can be solved by increasing the memory capacity, but the cost increases as the memory is increased.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and the unpleasant sensation felt when viewing a reproduced image at the same time as the current broadcast or after the end of the current broadcast is finished. In order to eliminate the occurrence of the occurrence, the current broadcast is continuously watched after the playback is finished by aligning the playback video with the current broadcast in a natural manner so that it can be seen as if the broadcast time has elapsed. In addition to providing a video playback device that does this, if you leave the place for a while while watching the screen, you will not miss the current broadcast including the video for the time you were away, It is a problem to be solved to provide an image receiving device equipped with a video reproducing means capable of reproducing a video for a time at a minimum cost.

[0004]

According to a first aspect of the present invention, a video input means for inputting a video signal of a current broadcast, an image memory means for sequentially recording the video signal from the video input means as image data, A memory management means for managing and controlling the image memory means, an image output means for displaying an image of an input video signal, and an input to the image output means is a current broadcast video signal from the video input means, or In an image receiving device having a video reproducing means having a switching means for switching to any of the reproduced video signals from the image memory means, the image memory means is recorded before the switching means is switched to the reproduced video signal. In addition to the first memory area, a second memory area for recording the current broadcast image data from the time of switching is provided, and the memory management means is Serial to the first and the order in which the data is input to a second access to the image data recorded in the memory area from the first memory area of the second memory area,
In addition, if the time axis is set to a predetermined compression ratio and you want to view the video before a certain time again, switch to the playback video and continue after viewing the playback image up to the elapsed time. The current input video can be viewed, and it is possible to enjoy the reproduced image with a more natural transition without being temporally behind the input video of the current broadcast.

According to the invention of claim 2, the video signal of the current broadcast,
Video and audio input means for inputting audio signals, image memory means for sequentially recording video signals from the video input means as image data, and audio memory for sequentially recording audio signals from the audio input means as audio data Means, memory management means for managing and controlling the image memory means and the audio memory means, an image display for an input video signal, an image for audio display for an input audio signal, an audio output means, and the image , Audio, which has switching means for simultaneously switching the input to each of the audio output means to either the current broadcast signal from each of the video and audio input means, or the reproduced video or audio signal from each of the memory means In the image receiving device including reproduction means, the image and audio memory means are recorded before the switching means is switched to a reproduction signal. In addition to the first memory area, there is a second memory area for recording the data of the current broadcast from the time of switching, and the memory management means is arranged in the first and second memory areas of each of the memory means. The recorded data is accessed in the order in which the data is input from the first memory area to the second memory area, and with the time axis set to a predetermined compression rate. If you want to check the video / audio again, you can switch to the playback operation, check the playback image / audio up to the elapsed time, and then view the current input video / audio. It is possible to enjoy the reproduced image / sound with a more natural transition without being delayed in time with respect to the input image / sound of.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the memory management means can easily change the reproduction speed by changing the setting of the compression coefficient that determines the compression rate of the time axis. It was done.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, the memory management means reproduces the reproduction progress according to the set value of the compression ratio on the time axis during the operation of the reproduction video signal started by the switching. In response to the transition of time, the data in the first memory area is updated to the sequentially connected data in the second memory area so that the switching operation can be performed again. If you want to play it again with, if there is free space in the memory of the playback area, replay will be performed from the beginning of the first playback start, and if there is no free memory in the playback area, the start of replay will be constant. Re-playing is performed from a time before, and it is possible to play again even during image playback.

According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, the memory management means, when data exceeding the capacity of the first memory area and the second memory area is input, Even if it is separated from the monitor screen, it is possible to perform an additional operation that makes it possible to record new input data by thinning out the data that has already been input, and to provide a selection means for selecting that operation, Play the video from a distance and the video up to the elapsed time, and then
Since it is switched to the input video, it is possible to view the video without time discontinuity with the input video, and it is possible to reproduce the image regardless of the time away from the monitor screen with the memory of a fixed capacity.

According to a sixth aspect of the invention, in the fifth aspect of the invention, the memory management means performs division management of the first memory area and the second memory area, and a memory table of reproduced image data. It is possible to control and manage and control the memory and the reproduction time.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiments of Claims 1 and 2) FIG. 1 is a block diagram showing an outline of an embodiment of an image receiving apparatus provided with a video reproducing means of the present invention. The configuration and operation of this embodiment will be described below with reference to FIG. In the video input unit 1, the video signal is separated and output into a luminance signal (Y signal) and two color difference signals (RY signal and BY signal). In the normal state, the video switching unit 5 is connected to the contact 5a, and the video signal output from the video input unit 1 passes through the video switching unit 5 and the video output unit 6 and is currently broadcast to the monitor 7. Is projected. The video signal from the video input unit 1 is always output to the video compression unit 2,
The image is compressed and encoded by the video compression unit 2 as still image data,
It is stored in the video memory unit 8 via the buffer memory 3. Here, by issuing a playback start command, the contact 5a is switched to the contact 5b in the video switching unit 5, and the image data stored in the video memory 8 is transferred to the video decompression unit 4 via the buffer memory 3. The signal is decompressed and decoded. An image of this video signal is displayed on the monitor 7 through the video output unit 6.

Regarding voice, a voice signal is output from the voice input unit 11. In the normal state, the voice switching unit 15
Is connected to the contact 15a, the audio signal output from the audio input unit 11 passes through the audio switching unit 15, is amplified by the audio output unit 16, and is output from the speaker 17. On the other hand, the audio signal from the audio input unit 11 is always output to the audio compression unit 12, is A / D converted into audio data by the audio compression unit 12, is compressed, and is then stored in the buffer memory 1.
It is stored in the voice memory 18 via 3. Here, when the reproduction start is instructed, the audio switching unit 1
5, the contact 15a is switched to the contact 15b, and the audio data stored in the audio memory 18 is expanded by the audio expansion unit 14 via the buffer memory 13 and A / D converted to the audio signal to output the audio. The signal is amplified by the section 16 and output from the speaker 17.

FIG. 2 is a diagram for explaining the transition of the operating state in the image receiving apparatus having the above-mentioned video reproducing means.
The playback function of the present invention will be described with reference to FIG. In FIG. 2, (A) shows the time transition of the video state of the monitor screen. (B) shows still image data divided into blocks taken in by the video compression unit 2. Broadcast images M1 to M5 before the image reproduction start (START) are:
In the playback area memory, broadcast video M after the start
6 to M12 represent images accumulated in the chase area.
(C) shows compressed still image data accumulated in the video memory 8, data of the playback area memory to be reproduced is shown as P1 to P5, and data of the chase area memory is shown as O6 to O12. The image data is decompressed and decoded by the video decompression unit 4 and displayed on the monitor screen as a reproduced image of (A). As shown in the left diagram of FIG. 5, the video memory 8 is divided into a playback memory area and a chasing memory area. When the playback area is in a state other than the playback operation, the current broadcasts are sequentially accumulated, and when the memory capacity becomes full, old data is deleted and updated with new data. This means that video data for a certain period of time will be accumulated. Image data of the current broadcast from the start of reproduction is compressed and accumulated in the chase area.

The flow of image data from the start of reproduction will be described (see FIG. 2). The image data of P1 to P5 accumulated in the playback area of the video memory 8 passes through the video decompression unit 4. Then, the images are sequentially displayed on the monitor 7. Next, the image data is sequentially reproduced from the image data O6 of the current broadcast accumulated in the chase area during reproduction of the playback area. Then, when the reproduced image has caught up with the current broadcast (at the time when the image data of O12 is reproduced), the contact of the video switching unit 5 is switched from 5b to 5a and the current broadcast is displayed on the monitor. Therefore, the playback image can be played back, and the image broadcast during playback can be viewed for a long time without any loss of the image, and the broadcast can be watched in a normal state by catching up with the current broadcast. it can.

Similarly to the video, the audio data is compressed and stored in the audio memory 18 in the playback area and the chase area in the audio memory 18, and the audio is reproduced while matching the video with the audio. It Explaining the flow of the audio data after the reproduction is started, the audio data of P1 to P5 accumulated in the playback area of the audio memory 18 is amplified by the audio output unit 16 via the audio decompression unit 14. , To the speaker 17. Next, the audio data is sequentially reproduced from the audio data O6 of the current broadcast accumulated in the chase area during the reproduction of the playback area. Then, when the reproduced sound catches up with the current broadcast (at the time when the sound data of O12 is reproduced), the sound switching unit 15
The contact of is switched from 15b to 15a to output the sound of the current broadcast to the speaker 17. Therefore, it becomes possible to play back the playback audio and listen to the audio broadcast during playback for a long time without loss of the image, catching up with the current broadcast and viewing the image in a normal state. However, it becomes possible to hear the voice at the same time. Here, simply playing the voice quickly changes the voice quality and makes it hard to hear, so there is a method to reduce the amount of data by cutting silence between conversations or cutting sounds below a specified level. It is used for compression, and audio is output according to the video.

(Embodiment 3) FIG. 3 is a diagram for explaining the relationship between the time of the current broadcast image to be captured and the reproduced image in the embodiment of the present invention. The variable playback speed function of the stored image in the present invention will be described with reference to FIG. For the playback time of the accumulated video,
As shown in FIG. 3, when a certain time during which an image is captured before the start of reproduction is X and the reproduction time from the reproduction start to the finish is Y, the reproduction time Y is the data αX accumulated before the start and the finish from the start. Must be equal to the sum of the data αY accumulated up to. Therefore, the equation (1) is given. Y = αX + αY (1) where α is a time axis compression coefficient. The horizontal axis represents time t. Y = (α / 1−α) × X (α <1) (2) Therefore, the time required for the reproduction is obtained by the equation (2), and it is necessary to manage the memory of the playback area and the chase area. By providing a parameter for setting the compression coefficient α, it is possible to easily determine the variable speed of the reproduced image.

At the time of actual reproduction, the reproduction image speed variable function is realized by performing the thinning reproduction of the stored image so that the playback image is reproduced at the time obtained by the equation (2). First, the compressed image data is accumulated in the playback area address of the video memory 8 shown on the left side of FIG.
Time compression to. Therefore, for example, α = 0.5
In that case, it will be played in half the time of the current broadcast,
Of the 2n pieces of data, only odd-numbered data is thinned out and reproduced. Next, in the chase area, data is similarly compressed and accumulated, temporally compressed from Y to αY, and thinned and reproduced.

From the equation (2), if α = 0.5, Y = X, so that the same time as the playback area is accumulated and the reproduction is performed in half the time, which is 2n pieces of data. With, only the data of odd number is thinned out and reproduced. Therefore, α
= 0.5, the memory management of the playback area and the chase area is performed so that the time X before the fixed time and the elapsed time Y become the same. Further, if α = 1/3, the elapsed time Y becomes Y = X / 2 from the equation (2), and 2/3 of the image data is thinned out so that the reproduction time is half the time X which is a predetermined time before. It becomes possible to reproduce. Conversely, α =
If it is set to 2/3, the elapsed time Y becomes Y = 2X according to the equation (2), and it is possible to thin out the image data by 1/3 and reproduce the reproduction time at twice the time X before the fixed time. Become.
That is, when the compression coefficient α is close to 0, the reproduction time can be shortened, and when α is close to 1, the reproduction can be performed as close as possible to the current broadcast. Therefore, it is possible to easily determine the speed variation of the reproduced image by providing the parameters of the time X and the compression coefficient α which are a predetermined time before and changing the numerical values of the parameters.

(Embodiment of claim 4) FIG. 4 is a diagram for explaining the transition of the operating state in the image receiving apparatus provided with the image reproducing means of the present invention capable of performing another operation. An embodiment of the operation when playback playback is started again during playback playback will be described based on FIG. 4, like FIG. 2, (A) shows the time transition of the video state of the monitor screen, (B) shows the still image data divided into blocks taken in by the video compression unit 2, and (C). ) Indicates compressed still image data accumulated in the video memory 8, data of the playback area memory to be reproduced is indicated by P1 to P8, and data of the chase area memory is indicated by O6 to O15. Image data is decompressed and decoded by the video decompression unit 4 and displayed on the monitor screen as a reproduced image of (A). When playback playback is started, first, the data P1 to P5 stored in the playback area of the storage device is played back. The current broadcasts are stored in the chase area at the time they are being played (O6, O7 ...), but at the same time, the current area also remains in the empty area created by deleting the old input time data in the playback area. Store broadcasting (P6, P7
……) In this way, if there is enough memory in the playback area, the current broadcast will be accumulated until it is full.

In this way, when the playback function is started again at the time of re-START in FIG. 4, the data of P1 to P3 in the playback area is deleted, and P6 to
The data of P8 is updated, the data of P4 to P8 is accumulated in the entire playback area, and the data of O6 and subsequent ones are sequentially accumulated in the chase area. Then, from the time of the restart, P4 to P8 in the playback area are reproduced, and then O in the chase area is reproduced.
9 to O15 are reproduced. Naturally, P in the playback area
Since 4 to P8 are reproduced, the data of O6 to O8 accumulated in the chase area is not reproduced. After the restart is started, the data from P9 is updated and accumulated in the playback area in preparation for the restart of the playback. Therefore, even if the playback is restarted again during the image reproduction, the reproduction is started from the image of a certain time before, and at the time of the finish, catching up with the current broadcast and reproducing the broadcast in the normal state as in the above-described embodiment. Can be seen at.

(Embodiments of Claims 5 and 6) FIG. 5 shows the contents of data in each memory area for explaining the function of performing a variable long-time reproduction in a memory having a constant capacity in the embodiment of the present invention. FIG. In each of the above-described embodiments, the function of playing back the scene that the viewer wants to see again is used. However, in this embodiment, for reproducing the image of the time until the viewer leaves the screen of the monitor and returns. This shows a method, and it is possible to realize reproduction in a fixed capacity memory in a variable long time. As shown in FIG. 5 showing the memory contents in the video memory 8, the data is divided and accumulated in the playback area and the chase area, but each memory capacity is constant. Therefore, the following method is used to change the reproduction time. Press the key when you leave the monitor screen, press the play key when you return,
The video at any time between them is stored in the playback area. The playback area has 2n address areas and can store compressed image data up to P2n. If you are not looking at the monitor for a short time, there is less than 2n image data, so even if playback is started, there is no problem if you play back the stored data as is, but if you cannot see the monitor for a long time, More than 2n image data will be accumulated in the playback area.

In this case, since the address is full, the data at the old even address (addresses 2, 4 ...) Is deleted and new data (P2n + 1, P2n) is stored there.
+2 ...) is thinned out, inserted, and accumulated. The video of the current broadcast that is being played back in the playback area is accumulated as image data in the chase area. However, when the image data exceeds O2n, the old even addresses (addresses 2, 4 ...) data is deleted, and new data (O2n + 1, O2n + 2 ...) is thinned out and inserted, and the process of accumulating is performed. Reproduction is P1, according to the order of accumulation.
P3, ... P2n, P2n + 1, P2n + 2, ... O
1, O3, ... O2n, O2n + 1, O2n + 2, ...
And play. Therefore, even if you can't watch the current broadcast from the monitor for a long time, the image data is decimated and stored in a memory of a certain capacity, so the time sequence does not change from the current broadcast even if you start playback after returning. You can see the image. Further, in the memory management for capturing the input video, the memory management 9 manages the memory division of the playback area and the chase area of the video memory 8 without depending on the CPU 10 and the video memory 8
It is possible to manage and control the memory and the reproduction time by controlling the reproduction image data memory table of.

[0022]

【The invention's effect】

Advantageous effect of claim 1: When it is desired to watch again the video before a certain time period from the current broadcast being received, it is possible to view the input video currently being received based on the playback image up to the elapsed time. Since it is possible to play back the recorded video as before, it is not possible to watch the current broadcast while the playback image is displayed on the monitor because only the playback video is displayed on the screen. Also, because the current broadcast and the playback image are displayed on two screens, if you focus on the content of the playback image, it becomes difficult to grasp the content of the current broadcast screen,
Focusing on the contents of the current broadcast, it will not be difficult to grasp the contents of the playback image screen, and whether you are watching the current broadcast without interposing the playback image with respect to the input video in time. You can see the image like this.

Effect of claim 2: When it is desired to check again the video / audio for a certain period of time before the current broadcast being received, the reproduced image / audio up to the elapsed time is checked, and then the current input is made. You can see the video / audio, and when playing back the recorded video / audio as before, only the playback video is displayed on the screen and the playback image is displayed while the playback image is displayed on the monitor. Can not hear the sound of the current broadcast, and because the current broadcast and the playback image are displayed on two screens, if you pay attention to the audio content of the playback image, it becomes difficult to grasp the audio content of the current broadcast screen. , Paying attention to the contents of the current broadcast, it is not difficult to grasp the audio contents of the playback image screen or to hear the audio at the same time. It is possible to hear the sound while watching one of as image looking at the current broadcasting without also before and after the time-in's.

The effect of claim 3: In addition to the effect of claim 1 or 2, since a video before a predetermined time and a video up to an elapsed time dating back from the current broadcast being received are reproduced, the input video can be subsequently switched. , You can see the video without time discontinuity with the input video, but you can easily realize the variable adjustment of the playback speed by setting the time axis compression coefficient and the parameter of the time required for playback by operating the remote control etc. it can.

Effect of claim 4: In addition to the effects of claims 1 to 3, when the user wants to reproduce again while watching the reproduced image, if the memory in the playback area is empty, the first reproduction is started. Replay is performed from the point in time, and if there is no empty memory in the playback area, replay is performed from a certain time before the start of replay, and even during image playback, image playback is performed from a certain time ago. be able to.

Effect of Claim 5: In addition to the effects of Claims 1 to 4, even when the monitor screen is separated, the image of the separated time and the image up to the elapsed time are reproduced, and then the input image can be switched. Therefore, regardless of the time away from the monitor screen, it is possible to view the reproduced image without any temporal disconnection from the input video in the memory having a fixed capacity. Therefore, it is not necessary to increase the memory capacity, resulting in cost reduction.

Effect of claim 6: In addition to the effect of claim 5, since the memory management is provided with memory area division management and memory table control of the reproduced image data in capturing the input video, the CPU is burdened. Memory and playback time can be managed and controlled without

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of an embodiment of an image receiving apparatus provided with a video reproducing means of the present invention.

FIG. 2 is a diagram for explaining the transition of the operating state in the image receiving device provided with the image reproducing means of the present invention.

FIG. 3 is a diagram illustrating a time relationship between a current broadcast image to be captured and a reproduced image according to the embodiment of the present invention.

FIG. 4 is a diagram for explaining a transition of an operation state in an image receiving device including the image reproducing means of the present invention which enables another operation.

FIG. 5 is a diagram showing the content of data in each memory area for explaining the function of performing variable long-time reproduction in a memory having a constant capacity according to the embodiment of the present invention.

FIG. 6 is a conceptual diagram of a conventional example in which a current broadcast image and a reproduced image are displayed on two screens.

[Explanation of symbols]

1 ... video input section, 2 ... video compression section, 3, 13 ... buffer memory, 4 ... video decompression section, 5 ... video signal switching section, 6
... video output section, 7 ... monitor, 8 ... image memory, 9 ... memory management section, 10 ... CPU, 11 ... audio input section, 12 ... audio compression section, 14 ... audio decompression section, 15 ... audio signal switching section, 16 ... voice output unit, 17 ... speaker, 18 ... voice memory.

Claims (6)

[Claims] 1. A video input means for inputting a video signal of a current broadcast, an image memory means for sequentially recording the video signal from the video input means as image data, and a memory management means for managing and controlling the image memory means. And an image output means for displaying an image of the input video signal, and an input to the image output means is either a current broadcast video signal from the video input means or a reproduced video signal from the image memory means. In the image receiving device provided with the video reproducing means having the switching means for switching to, the image memory means is provided with the first memory area recorded before the switching means is switched to the reproduced video signal, from the time of the switching. And a second memory area for recording the current broadcast image data of the first broadcast image data, and the memory management means includes the first and second memory areas.
Access to the image data recorded in the memory area is performed in the order in which the data is input from the first memory area to the second memory area and with a predetermined compression rate on the time axis. An image receiving apparatus provided with video reproducing means characterized by. 2. A video and audio input means for inputting a video signal and an audio signal of the current broadcast, an image memory means for sequentially recording the video signal from the video input means as image data, and the audio input means. An audio memory means for sequentially recording audio signals as audio data; a memory management means for managing and controlling the image memory means and the audio memory means; an image display of an input video signal and an audio display of an input audio signal. Image and audio output means to be performed, the image,
Video and audio reproduction having switching means for simultaneously switching the input to each audio output means to either the current broadcast signal from each of the video and audio input means or the reproduced video or audio signal from each of the memory means In the image receiving device including means, each of the image and audio memory means is provided with data of the current broadcast from the time of switching, separately from the first memory area recorded before the switching means is switched to the reproduction signal. While having a second memory area for storing the data, the memory management means accesses the data recorded in the first and second memory areas of each memory means from the first memory area to the first memory area. The audio and video reproducing means is characterized in that the data is input in the memory area of the second memory in the order in which the data is input and the time axis is set to a predetermined compression rate. Apparatus. 3. The video reproduction means according to claim 1, wherein the memory management means changes the reproduction speed by changing the setting of the compression coefficient that determines the compression ratio of the time axis. Image receiving device. 4. The memory management means corresponds to the transition of the reproduction elapsed time according to the set value of the compression ratio on the time axis during the operation of the reproduction video signal started by the switching, and corresponds to the first memory area. 4. The video reproducing means according to claim 1, wherein the data of FIG. 3 is updated to the sequentially connected data of the second memory area to enable the switching operation again. Image receiving device. 5. The memory management unit thins out the already input data to obtain new input data when data exceeding the capacity of the first memory area and the second memory area is input. 2. An additional operation for enabling recording is performed, and a selecting means for selecting the operation is provided.
An image receiving apparatus comprising the image reproducing means described in any one of 1 to 4. 6. The memory management means performs division management of the first memory area and the second memory area, and controls a memory table of reproduced image data. An image receiving device comprising the image reproducing means described in 5.