JP2002199323A - Television set with playing back function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a television receiver capable of freely playing back a scene desired to watch once again without setting a video in advance. SOLUTION: A play back circuit 2 consists of a remote control reception part 21, a storing processing part 22, a video recording processing part 23, a play back processing part 24 and an input switching part 25. During televising, the circuit 22 converts the analog signals of video and sound inputted from a VIF video wave detection circuit 12 and an FM wave detection circuit 14 to digital signals and stores them in a buffer memory M2. When a video recording button 34 of a remote controller 3 is pressed, the part 23 retains the encoded stream of video and sound stored in the memory M2 until then in a hard disk H1. When the play back button 35 of the remote controller 3 is pressed, the part 24 reads the encoded stream retained in the disk H1 to transfer it to a buffer memory M3 and restores it to the original analog signals of the video and sound to switch the video of the television receiver from broadcasting to playing back.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television with a playback function capable of reproducing the latest video projected on a television screen at any time retroactively for a predetermined time.

[0002]

[Problems to be Solved by the Invention] When we usually watch TV, we often want to see again the scenes that left an impression, the scenes that we want to check the contents well, and the scenes that we overlooked casually. . In such cases, if you do not record the video, you may feel frustrated and unhappy.

[0003] In general, programs recorded in videos are often films and dramas whose broadcast contents are known in advance.
Programs such as news and sports are rarely recorded in video because their broadcast contents are unpredictable and emphasize freshness and immediacy. However, since there are many scenes in these programs that the user wants to watch again, such problems often occur.

Accordingly, an object of the present invention is to provide a television receiver which can be freely reproduced at any time if there is a scene to be watched again without setting a video in advance.

[0005]

In order to achieve the above object, the present invention is configured as follows.

That is, the first aspect of the present invention is a time axis video recording means for sequentially recording the latest video projected on a television screen along a time axis, and a time axis video recorded at a predetermined time before and at any timing. A time-axis video storage means for storing the video, and a time-axis video playback means for playing back the stored time-axis video repeatedly at an arbitrary timing an arbitrary number of times, wherein the latest video reflected on the TV screen is traced back a predetermined time. This is a television with a playback function that can be reproduced at any time. The invention according to claim 2 is the television with a playback function according to claim 1, wherein the trigger at the arbitrary timing is an operation signal of a remote controller. The invention according to claim 3 is the television with a playback function according to claim 1, wherein two or more of the time axis images can be simultaneously stored. Claim 4
The invention according to claim 1 is the television with a playback function according to claim 1, wherein the time axis video playback means has a trick mode playback function. The invention according to claim 5 is the television with a playback function according to claim 1, wherein when the time axis video is stored, a notification signal notifying the saving is displayed. According to a sixth aspect of the present invention, when the time axis video is reproduced, an information signal indicating the fact is displayed.
A television with a playback function as described.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a television with a playback function according to the present invention. The television with the playback function is provided between the tuner 11 / VIF video detection circuit 12 and the video amplification circuit 13 and the FM detection circuit 14 and the low-frequency amplification circuit 15 of the television receiver 1 via the video and audio input switch S1. The playback circuit 2 is connected to the baseband.

The playback circuit 2 includes a built-in type and an adapter type. In the case of the adapter type, the input side is a television receiver 1.
Is connected to the video and audio output terminal T1, and the output side is connected to the video and audio input terminal T2. The video and audio output terminal T1 is a terminal for directly outputting a broadcast video and audio signal received by the television receiver 1 to the outside, thereby having the same contents as those always displayed on the screen of the television receiver 1. The video and audio signals are supplied to the playback circuit 2. The video and audio input terminal T2 is a terminal for directly applying an external composite color signal and audio signal to the video amplifier circuit 13 and the low-frequency amplifier circuit 15 of the television receiver 1, so that the transmission path to the CRT is relatively short. As a result, a playback video with good image quality with little deterioration in image quality can be obtained. When the video of the television receiver 1 is switched between playback and broadcasting or any other, an AV control signal is output from the adapter via the multi-connector C1, thereby turning the input switch S1 of the television receiver 1 on. Switch.

The built-in type is superior in operability as compared with the adapter type, such that the connection by a connector or a cable is eliminated, the appearance can be neatly organized, and remote control can be integrated. In addition, connectors and cables are not required, and the housing and the power supply can be shared, so that the overall cost can be reduced.

The playback circuit 2 includes a remote control receiving unit 2
1, a storage processing unit 22, a recording processing unit 23, and a reproduction processing unit 24
And the input switching unit 25. The remote control receiver 21
An operation signal from the remote controller 3 is received, and a command signal is output to each of the recording processing unit 23, the reproduction processing unit 24, and the input switching unit 25.

FIG. 4 is a front view of a remote controller embodying the present invention. The remote controller 3 includes a power button 31, a volume control button 32, a channel switching button 33, and the like, and a recording button 3 for designating recording required for basic playback operations.
4. A playback button 35 for designating playback, a return button 36 for switching the video of the television receiver 1 from playback to broadcasting or the like are arranged. In addition, a pause button 37, a slow playback button 38, a fast forward playback button 39, and the like necessary for trick mode playback are arranged. The operation buttons for playback, such as the recording button 34, the reproduction button 35, and the return button 36, may be integrated into one to simplify the operation. In this case, when the button is pressed first, the image of the television receiver 1 is switched from broadcast or other to playback,
Next, when the button is pressed, the image of the television receiver 1 returns to the original broadcast or the like from the playback.

FIG. 2 is a block diagram of an accumulation processing section of a playback circuit embodying the present invention. Storage processing unit 22
The LPF 221 limits the bandwidth of the video and audio analog signals input from the VIF video detection circuit 12 and the FM detection circuit 14, and samples the video and audio at different sampling frequencies by the S & H 222 to generate sample values at fixed intervals. This is quantized by an A / D converter 223 and converted into a video and audio digital signal. Further, the digital signal of the one-dimensional video is transferred to the frame memory M1 on a screen basis to generate image data P (t) of the two-dimensional video.

The MPEG encoder 224 uses a method such as DCT, quantization, motion compensation, bidirectional prediction, etc.
(T) is compressed to obtain continuous image data {P
(T), the audio code is multiplexed with the multiplexed data, and the multiplexed audio code is stored in the buffer memory M2 for a fixed time frame to generate a coded video and audio stream for a fixed time. Continuous image data ΣP
In (t), the latest GOP is overlapped with the oldest GOP and stored in the buffer memory M2, and the area of a certain time frame is cyclically reused. The GOP is a predetermined number of seconds (for example, t = 0.5) or a predetermined number (for example, N = 1).
The image data P (t) of 5) is put into one group. The continuous image data ΣP (t) has a predetermined number of seconds (for example, t
= 15) or GOP of a predetermined period (for example, M = 30)
Is accumulated in a certain time frame. The coded stream may be stored in a large-capacity shift register or FIFO memory instead of being stored in the buffer memory M2. Shift register or F
By switching the output of the IFO memory to the input side, it is possible to repeatedly extract the code bits of the coded stream stored easily and reproduce the video and audio for a certain period of time many times.

Upon receiving a recording request command signal from the remote control receiving unit 21, the recording processing unit 23
2 is stored in the hard disk H1 for a predetermined time period. At this time, the continuous image data {P
The GOPs of (t) are sorted and stored in chronological order. At this time, the beginning of the first GOP is performed by referring to a sequence header specifying an entry point in GOP units. In addition, it outputs a sign signal of a video and / or an audio signal indicating that recording is in progress. The hard disk H1 is configured to cyclically reuse a data set of a certain limit (for example, N = 10). When the coded stream to be stored exceeds the certain limit, the hard disk H1 returns to the first data set and returns to the first code set. Overwrite the stream. The overwritten first encoded stream disappears at this point.

FIG. 3 is a block diagram of a reproduction processing unit of a playback circuit embodying the present invention. Playback processing unit 24
When receiving the command signal of the reproduction request from the remote control receiving unit 21, the extraction processing 241 reads out the latest encoded stream stored in the hard disk H1 and transfers it to the buffer memory M3. At this time, when a command signal of a reproduction request is continuously received from the remote control receiving unit 21, the coded stream is sequentially read from a new coded stream in the storage order and transferred to the buffer memory M3. Record button 34, Play button 3
In a case where the 5 and the return button 36 are combined into one to make the operation one touch, the processing of the reproduction processing unit 24 is performed continuously after the processing of the recording processing unit 23. ,

The MPEG decoder 242 separates the coded stream in the buffer memory M3 into video and audio, and converts the video code into image data P (t) in units of one screen by a method such as inverse DCT, inverse quantization, and motion compensation. To the frame memory M
Transfer to 4. When the playback is repeated many times, after the last image data P (t) is transferred, the process returns to the top again and the image data P (t) is repeatedly transferred to the frame memory M4. When the playback is completed only once, the TV receiver 1 transfers the last image data P (t).
Input switch S1 from the reproduction processing unit 24 side to the VIF
Switching to the video detection circuit 12 and the FM detection circuit 14, the video and audio of the television receiver 1 are returned from playback to the original broadcast and the like. The image data P (t) and the audio code are D / A
The converter 243 returns the waveform to a sampled analog signal, and the LPF 244 interpolates between the samples to restore the original analog signal. At this time, a sine signal of video and / or audio notifying that playback is being performed is superimposed on the analog signal.

When the input switching unit 25 receives a reproduction request command signal from the remote control receiving unit 21, the input switching unit 25 switches the input selection switch S1 of the television receiver 1 to the VIF video detection circuit 12 and the FM
The detection circuit 14 is switched to the reproduction processing unit 24. When receiving a return request command signal from the remote control receiver 21, the input switch S1 of the television receiver 1 is switched from the reproduction processor 24 to the VIF video detector 12 and the FM detector 14.

The television with playback function embodying the present invention has the above-described configuration. During the broadcast of the television, the accumulation processing unit 22 is operated by the VIF video detection circuit 12 and the FM detection circuit 14.
Is converted into digital signals, multiplexed into encoded video and audio streams, and stored in the buffer memory M2 in a fixed time frame.

Next, when the recording button 34 of the remote controller 3 is pressed, the recording processing section 23 sets the buffer memory M2 up to that point.
Is stored in the hard disk H1. At this time, the next recording request is rejected until the buffer memory M2 becomes full with the next coded stream after a certain period of time.

Next, when the playback button 35 of the remote controller 3 is pressed, the playback processing unit 24 reads the latest encoded stream stored in the hard disk H1 and transfers it to the buffer memory M3 to separate the video code and the audio code. Respectively to restore the original video and audio analog signals. at the same time,
The input switch 25 is an input switch S of the television receiver 1.
1 is switched from the VIF video detection circuit 12 and the FM detection circuit 14 to the reproduction processing unit 24, thereby the television receiver 1
Is switched from broadcast or other to playback.

Next, when the return button 36 of the remote controller 3 is pressed, the input switching unit 25 switches the input switching switch S1 of the television receiver 1 from the reproduction processing unit 24 to the VIF video detection circuit 12 and the FM detection circuit 14 side. Switching, whereby the video of the television receiver 1 returns from playback to the original broadcast or the like.

[0023]

As described above, the television with the playback function according to the present invention can be constructed such that the latest video projected on the television screen can be reproduced at any time by going back a predetermined time. Therefore, according to the present invention, even once overlooked, the scenes that one wants to see again can be freely reproduced at any time. Become. Further, by providing unconventional convenience, the added value of the television can be further enhanced.

In the television with the playback function of the present invention, the playback timing is operated by a remote controller. Therefore, according to the present invention, the playback operation can be performed at hand while watching the television, so that the timing is not lost.

Further, the television with the playback function of the present invention can simultaneously perform two or more recordings. Therefore, according to the present invention, while recording an impressive scene at the same time while enjoying an unobstructed television picture, the C
It can be used to enjoy watching carefully during M hours.

Further, the television with the playback function of the present invention enables trick mode playback such as pause, slow playback, and fast forward playback. Thus, according to the present invention,
Since you can freely change the playback speed of the playback,
You can more precisely capture the video of the scene you want to see again from various angles.

Further, the television with the playback function of the present invention displays an information signal for notifying the user at the time of playback. Therefore, according to the present invention, it is possible to confirm whether or not a scene to be watched again has been reliably recorded, and to prevent confusion between broadcasting of television video and the like and playback.

[Brief description of the drawings]

FIG. 1 is a block diagram of a television with a playback function embodying the present invention.

FIG. 2 is a block diagram of an accumulation processing unit of a playback circuit embodying the present invention.

FIG. 3 is a block diagram of a reproduction processing unit of a playback circuit embodying the present invention.

FIG. 4 is a front view of a remote controller embodying the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Television receiver 11 Tuner 12 VIF video detection circuit 13 Video amplification circuit 14 FM detection circuit 15 Low frequency amplification circuit 2 Playback circuit 21 Remote control reception unit 22 Storage processing unit 221 LPF 222 S & H 223 A / D converter 224 MPEG encoder 23 Recording Processing Section 24 Playback Processing Section 241 Extraction Processing 242 MPEG Decoder 243 D / A Converter 244 LPF 25 Input Switching Section 3 Remote Control 31 Power Button 32 Volume Control Button 33 Channel Switching Button 34 Recording Button 35 Playback Button 36 Return Button 37 Pause button 38 Slow playback button 39 Fast forward playback button C1 Multi-connector H1 Hard disk M1, M4 Frame memory M2, M3 buffer memory S1 Input switch T1 Output terminal T2 Input terminal

Claims (6)

[Claims] 1. A time-axis video recording means for sequentially recording the latest video projected on a television screen along a time axis, and a time-axis video for storing a time-axis video recorded at a given time before and up to a predetermined time. A storage means, and a time axis video playback means for playing back the stored time axis video repeatedly at an arbitrary timing and at an arbitrary number of times. TV with playback function. 2. The television with a playback function according to claim 1, wherein the trigger at the arbitrary timing is an operation signal of a remote controller. 3. The television with a playback function according to claim 1, wherein two or more of said time axis images can be stored simultaneously. 4. The television with a playback function according to claim 1, wherein said time axis video playback means has a trick mode playback function. 5. The television with a playback function according to claim 1, wherein when the time axis video is stored, a notification signal notifying the fact is displayed. 6. The television with a playback function according to claim 1, wherein, when the time axis video is reproduced, a notification signal notifying the fact is displayed.