JPH0730851A - Television broadcast recorder - Google Patents

Abstract

PURPOSE:To record a television program in real time and to reproduce the program at an optional time. CONSTITUTION:The device is provided with an A/D converter 1, a frame memory 2 storing tentatively digitally converted video data, a compression processing section 3 applying compression coding to video data read from the frame memory 2, a recorder 4 having a random accessible recording medium such as an IC memory recording the compression coded video data sequentially in an FIFO form with time data, an expansion processing section 5 decoding the compression coded video data read from the recorder 4 by a predetermined method, a reduction/magnification processing section 6 reducing or magnifying the original video data subject to expansion processing to a required display pattern size, a D/A converter 7, a changeover section 8 synthesizing the real time video signal based on the television program broadcast at present and the video signal reproduced via the recorder 4, a display section 9 displaying a video image and a control section 10 controlling each section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television broadcast recording apparatus for storing television programs in real time, time-shifting them, and reproducing them freely.

[0002]

2. Description of the Related Art There is a VTR (Video Tape Recorder) as a device capable of recording the contents of a program of a television broadcast, which can be played back at any time and is extremely convenient. However, when recording a TV program on this VTR, it is necessary to make a recording reservation in advance or to perform a predetermined operation to prepare for recording on the VTR before the start of the program to be recorded. However, there is a problem that the broadcast time is restricted as well as taking time.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a television broadcast recording apparatus capable of recording a television program sequentially in real time and selecting and reproducing the program very easily. To aim.

[0004]

In order to achieve the above object, an AD converter for converting an input video signal into a digital signal, a frame memory for temporarily storing the digitally converted video data, and a frame memory read out from the frame memory. A compression processing unit that compression-encodes the video data, a recording device that sequentially records the compression-encoded video data, an expansion processing unit that restores the compression-encoded video data read from the recording device, and an expansion unit. A reduction / enlargement processing unit that reduces or enlarges the processed original video data to a required display screen size, a DA converter that converts the video data into an analog signal, a video signal based on the current broadcast program, and the recording. A switching unit for synthesizing the video signal reproduced via the device,
It is composed of a display unit for displaying an image and a control unit for controlling each unit.

[0005]

With the above-described structure, the video signal based on the television broadcast program is digitized, and, for example, the code of the generic coding system is used, and the MPEG (Mov
ing Picture coding Expert
s Group) -2 standard, the data is recorded in real time on a recording device and is reproduced at an arbitrary time.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A television broadcast recording apparatus according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of an embodiment of a television broadcast recording apparatus according to the present invention. Reference numeral 1 is an AD converter that digitally converts the input video signal. Reference numeral 2 is a frame memory for temporarily storing the digitally converted video data. A compression processing unit 3 compresses and encodes the video data read from the frame memory 2 in accordance with the MPEG-2 standard, for example. Reference numeral 4 denotes a sequential FIFO (First
A recording device for recording in the In First Out format, which includes a randomly accessible recording medium such as an IC memory, a hard disk, or a magneto-optical disk. A decompression processing unit 5 restores the compression-encoded video data read from the recording device 4 by a predetermined method. 6 is a reduction / enlargement method for reducing or enlarging the original video data that has been decompressed to the required display screen size
It is an enlargement processing unit. Reference numeral 7 is a DA converter for converting video data into an analog signal. A switching unit 8 combines a real-time video signal based on a currently broadcast television program and a video signal reproduced via the recording device 4. Reference numeral 9 denotes a display unit that displays an image, such as a CRT. Reference numeral 10 is a control unit that controls each unit.

FIG. 2 is a time chart showing the recording / reproducing operation of the television broadcast recording apparatus according to the present invention. When television broadcasts are received in order such as program A, program B, ..., Program D, ..., By placing the television broadcast recording apparatus according to the present invention in the recording mode, those programs are real-time. , The program A, the program B, ..., The program D, ... In the order of reception, the video signal is compression-encoded for each program, and time data is recorded together by the recording device 4, which is a kind of recording address information. Is added and sequentially recorded. Then, when the capacity of the recording device 4 is full, new recording is performed while erasing the already recorded content from the first recording area. This allows endless recording. When reproducing, by setting the television broadcast recording device in a reproduction mode, for example, the program C is reproduced in real time or recorded at an arbitrary time after the program is received, based on the recording address information. When a program A is read from the recording device 4 and subjected to decompression processing, and if there is an instruction, the reduction / enlargement processing unit 6 zooms up a part of the screen, for example, and the switching unit 8 is currently receiving it. The reproduced program A is displayed on the child screen or the like with the program as the parent screen. still,
The reproduced program may be displayed as it is without performing the synthesizing process and the enlarging / reducing process, the capacity of the recording device 4 may be sufficiently increased, and a plurality of television broadcast recording devices according to the present invention may be connected in parallel. You may make it record a program of a different channel sequentially for every television broadcast recording apparatus. Also,
The video and audio may be recorded / reproduced by recording the program by using the intermediate frequency signal before separating the video signal and the audio signal.

[0008]

As described above, the present invention provides a television broadcast recording apparatus capable of recording a television program sequentially in real time and selecting and reproducing the program extremely easily. Therefore, for example, a document program broadcasted last week can be viewed as if it is a program currently being broadcast without performing any recording operation using a television broadcast recording device equipped with a recording device having a sufficient capacity. Therefore, there is a merit that the number of TV channels (the number of programs) is substantially increased.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a television broadcast recording device according to the present invention.

FIG. 2 is a time chart showing a recording / reproducing operation of the television broadcast recording apparatus according to the present invention.

[Explanation of symbols]

 1 AD converter 2 frame memory 3 compression processing unit 4 recording device 5 expansion processing unit 6 reduction / enlargement processing unit 7 DA converter 8 switching unit 9 display unit 10 control unit

Claims (6)

[Claims] 1. A for converting an input video signal into a digital signal
D converter, frame memory for temporarily storing digitally converted video data, compression processing section for compressing and coding video data read from the frame memory, and recording device for sequentially recording the compression coded video data A decompression processing unit for returning the compression-encoded video data read from the recording device to the original, and a reduction / enlargement processing unit for reducing or expanding the decompression-processed original video data to a required display screen size. A DA converter for converting the video data into an analog signal, a switching unit for combining the video signal based on the current broadcast program and the video signal reproduced via the recording device, and a display unit for displaying the video, A television broadcast recording device comprising: a control unit that controls each unit. 2. The television broadcast recording apparatus according to claim 1, wherein the audio signal is recorded in synchronization with the video signal. 3. The compression processing unit and the expansion processing unit are MP
The television broadcast recording apparatus according to claim 1, wherein compression encoding according to the EG standard is adopted. 4. The television broadcast recording apparatus according to claim 1, wherein endless recording is performed on the recording apparatus in a FIFO format. 5. The television broadcast recording device according to claim 1, wherein the recording device is a randomly accessible recording medium. 6. The television broadcast recording apparatus according to claim 1, wherein the switching section selects and outputs any video signal based on a control signal.