JPH10215437A - Digital broadcast reception reproduction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control a delay time and a reproduction processing speed of a reproduced program in response to an operation input by a user interface. SOLUTION: At least a component operated as shown in the following is provided to the device under the control of a CPU 40 mainly. Newest demodulated data for a prescribed time are written in a delay storage memory 150 sequentially to update old data, and demodulated data delayed by a proper time are read from the memory in parallel with the write. In the mode where the delay demodulation data are decoded and reproduced, the reproduction processing speed is properly increased to properly compress video and audio reproduction time bases for high speed reproduction. In response to the entry to an operation panel 60, whether decoding reproduction of real time demodulation data or decoding reproduction of delayed demodulation data by a designated time is controlled and the reproduction processing speed of the delayed demodulation data is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcast receiving and reproducing apparatus, and more particularly to a digital broadcast receiving and reproducing apparatus capable of storing and reproducing received program data.

[0002]

2. Description of the Related Art When a desired program is broadcast, it is not often impossible to watch the program when going out. Therefore, in general, a program is recorded on a video tape or the like so that a program desired to be watched is not missed by viewing it later at a convenient time.

[0003] However, when a movie to be broadcast is reserved for recording, the user goes out and goes home earlier than expected, so he returns home in a hurry to get ready for the start of broadcasting. May have been lost. Such a case is a problem. In other words, if you immediately start watching a movie being broadcast, you may not know what you missed first, and the story development of the movie may not be clear enough, and the fun may be lacking. However, if you look back at the movie being broadcast after rewinding the recorded amount, you missed the broadcast while watching the recorded amount,
After all the fun is halved. After all, while waiting for the end of the broadcast while waiting for the end of the broadcast while being frustrated that you can not see it just after the broadcast started,
I had to rewind the videotape that had been recorded to the end and take the time to start watching it.

[0004] Japanese Patent Application Laid-Open No. Hei 8-79685 discloses a reproducing apparatus capable of recording a broadcast portion being reproduced at the same time even if the program is being reproduced from the beginning of the broadcast.
With this device, a program can be continuously reproduced from the beginning to the end without a wait time.

[0005]

However, this is still insufficient as a reproducing function. If possible, it can be played back from any point in the program being played back, and can be fast-forwarded as needed to reduce the delay time for the program being broadcast and catch up. Unlike this, you can enjoy clearer video and audio and save time. In particular, we want to reduce the delay time by skipping broadcasts other than the contents of a program like commercials.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a digital broadcast receiving and reproducing apparatus capable of controlling a delay time and a reproduction processing speed of a program reproduced in response to an operation input by a user interface. Is to provide.

[0007]

In order to achieve the above object, a digital broadcast receiving and reproducing apparatus according to the present invention demodulates a received digital broadcast signal to obtain digitally encoded video and audio signals. Means for writing the demodulated data for the latest constant time in a predetermined storage means while sequentially updating the data, and means for reading out the demodulated data delayed by an appropriate time from the storage means in parallel with the writing operation. Decoding means for reproducing a video signal and an audio signal by decoding the real-time demodulated data from the demodulating means or the delayed demodulated data read from the storage means; and decoding and reproducing the delayed demodulated data. A fast-forward playback control means for appropriately compressing the playback time axis of video and audio by appropriately increasing the playback processing speed in the mode; A first user interface for controlling in response to a user input whether data is decoded and reproduced or whether the delayed demodulated data delayed by a specified time is decoded and reproduced, and a mode for decoding and reproducing the delayed demodulated data And a second user interface for controlling a reproduction processing speed of said fast-forward reproduction control means in response to a user input.

Preferably, in the mode of decoding and reproducing the delayed demodulated data, data of a delay time with respect to the real time of the video signal being decoded and reproduced is output.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, digital broadcasting will be briefly described. In digital broadcasting, it is possible to multiplex a plurality of programs obtained by compressing, encoding and multiplexing a video signal and an audio signal into one channel, and to broadcast four to eight channels on one carrier frequency band on multiple channels. . To realize such a broadcast,
A CS digital multi-channel broadcasting system using a communication satellite (hereinafter, CS) as a relay station is operated. In this system, video data of more than 50 channels and audio broadcast of more than 100 channels can be distributed in one CS by using data compression according to the MPEG2 standard for program data. At the time of reception, the digital data of the program desired by the user is decoded in real time from the received signal by the dedicated receiving device, and the video signal and the audio signal of the program are reproduced.

An apparatus according to an embodiment of the present invention will be specifically described. As shown in FIG. 1, it is possible to communicate with a contract broadcaster through a telephone line network 20 by means of a modem 10.
While exchanging with the IC card inserted into the C card I / F 30, the reception contract data such as billing and the descrambling ID for descrambling for pay broadcasting are transmitted to the CP.
U40 can be taken out. This CPU 40
Is a general control of the operation of the present apparatus, and operates according to a command from an operation panel 60 of a user interface in accordance with a control program read from the CPU 40 itself or the RAM / ROM 50 when the power is turned on.

At the time of receiving a program, the receiving frequency from the parabolic antenna 80 is determined by tuning the tuner 70. Since the output from the tuner 70 is digitally modulated for satellite broadcasting, it is demodulated by the QPSK demodulator 90. The output from QPSK demodulator 90 is error correction 1
After 00, only the packet of the desired broadcast program is descrambled by the descrambler 110 to be descrambled data (hereinafter, decompressed data). The decompressed data is separated into video, audio, and data packets by an MPEG2 Transport Demultiplexer (hereinafter, demultiplexer) 120, and the MPEG2 A / V decoder 130
Then, the decoded video signal and audio packet are decoded and decompressed and converted into analog signals to obtain the decoded video signal and audio signal. These signals are sent to a display, an amplifier, and a speaker (not shown). The exchange of signals and data between the units is performed via a bus 140.

What has been described so far is common to the prior art, and the characteristic features of the present invention will now be briefly described. In the apparatus of the present invention, the decompressed data is sequentially updated and written in the delay accumulation memory 150 for the latest fixed time, and in parallel with this writing operation, the delayed data already written is delayed by the designated time. Can be reproduced and output in response to a user input. In the mode for reproducing the delayed decompressed data, the reproduction time axis can be compressed for fast-forward reproduction. Further, a user interface function for controlling whether a signal being received is processed in real time to output video and audio (hereinafter, AV output) or delay decompressed data is output in response to a user input, and a delay. A user interface function for controlling the fast-forward reproduction processing speed of the decompressed data in response to a user input is provided, and the function is provided on an operation panel 60 as shown in the schematic diagram of FIG.

More specifically, referring to the flow chart of FIG. 3, data that has undergone processing such as tuning, demodulation, and decompression is demultiplexed by a demultiplexer 12 for real-time processing.
0, and at the same time, are written to the delay accumulation memory 150 (S10, S20). In this writing, the latest, for example, 100 minutes is accumulated while being sequentially updated. That is, an appropriate device such as a hard disk device or a semiconductor memory is applied as the delay accumulation memory 150. When a predetermined memory area is full of write data, the memory returns to the write start area and overwrites.

Next, it is specified by the input from the operation panel 60 whether the decompressed data is reproduced in real time or delayed, and when the real time reproduction mode is selected, the decompressed data is separated and decoded as described above. Process and output AV (S30, S40). When the delay playback mode is selected, a designated value for the delay time at the playback start point input from the operation panel 60 is obtained, and when a fast-forward instruction is given, a designated value for the playback speed is also acquired. Then, reproduction processing such as reading out the decompressed data with the specified delay time, separating and decompressing and decoding is performed at the specified fast-forward speed, and is output as AV (S50, S60, S7).
0, S80). At this time, the reading speed of the delay accumulation memory 150 also increases according to the speed of the reproduction process. The delay time is updated in accordance with the reduction of the delay time according to the reproduction speed (S90). If there is no fast forward instruction, the read decompressed data is output at a standard speed and output as an AV (S6).
0 → S100). In addition to the fast-forwarding, the playback speed can be frame-forwarding or stationary. It waits for an operation input from the operation panel 60 while performing such reproduction and delay time update processing (S30).

As a specific input operation of the operation panel 60, when a desired program is stored in the delay accumulation memory 150 of FIG. 1, as shown in FIG. It starts by pressing the button below the title of “Rec” after selecting the channel by appropriately pressing the upper and lower two buttons under “”. Of course, it is also possible to start recording at a predetermined time by operating a button (not shown) that realizes a timer function. It is also possible to always record without pressing the recording start button. In this case, the operation is completed only by selecting the channel.

In the case of reproduction, "Delay Tim
Pressing the "0" button under the title "e (-min)" causes real-time playback, and another button such as "3" or "3"
When the "0" button is pressed, the corresponding delayed decompression data 3 minutes or 30 minutes ago is specified. In addition, "Play Speed
The playback speed can be specified by turning the click dial 60b below the title of "d". When it is set to "1", it is the standard (Normal) speed, and when it is set to "2" or "3", it is double (Double). ) Speed, 3 times (T
Ripple speed, and if set to "0.5", frame (Frame) feed is performed at 1/2 speed, and if set to "0", pause is "Pause" (still). In addition to the above, operations such as playback stop can be designated by pressing a button below each title, and the execution state of each process such as the response to each operation input and the delay time of the program being played is displayed on the operation panel 60. It is displayed in area 60c.

[0017]

According to the digital broadcast receiving / reproducing apparatus of the present invention, delayed demodulated data can be read out and reproduced in parallel with writing the demodulated data to the storage means. it can. Also, since the demodulated data is written in the storage means while being updated, even if the broadcast program to be stored exceeds the storage capacity of the storage means, reproduction is started before the already written demodulated data is lost. This allows continuous playback from the beginning to the end.

Further, since the stored delayed demodulated data can be played back in a fast-forward manner, it is possible to watch in real time without deteriorating the video and audio being received by catching up with the program currently being broadcast. When watching the program, the viewing time can be shortened by the amount that can be fast-forwarded, and the reading speed of the demodulated data already written is higher than the writing speed, so that the storage capacity of the storage means can be given a margin. In particular, when skipping a broadcast portion other than the contents of a program such as a commercial at the time of fast-forwarding, it is possible to shorten the time while improving the entertainment of the program by the amount that the commercial is not viewed.

Furthermore, since the delay time of the delayed demodulated data to be reproduced can be specified by the first user interface, and the fast-forward reproduction processing speed can be specified by the second user interface, a very user-friendly device is provided. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a block diagram of a digital broadcast receiving and reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of an operation panel of the above device.

FIG. 3 is a flowchart showing an operation of the above device.

[Explanation of symbols]

 Reference Signs List 10 modem 20 telephone line network 30 IC card I / F 40 CPU 50 RAM / ROM 60 operation panel 60a button group 60b click dial 60c display area 70 tuner 80 parabolic antenna 90 QPSK demodulator 100 error correction 110 descrambler 120 MPEG2 Transport Demultiplexer 130 MPEG2 A / V decoder 140 bus

Claims (2)

[Claims] 1. A demodulation means for demodulating a received digital broadcast signal to obtain a digitally encoded video signal and audio signal, and sequentially updating the demodulated data for a predetermined period of time in a predetermined storage means. Writing means, means for reading out the demodulated data delayed from the storage means by an appropriate time in parallel with the write operation, and real-time demodulated data from the demodulation means or read from the storage means. Decoding means for reproducing the video signal and the audio signal by decoding the delayed demodulated data; and in the mode for decoding and reproducing the delayed demodulated data, the reproduction processing speed of the video and the audio is increased by appropriately increasing the reproduction processing speed. Fast-forward reproduction control means for appropriately compressing, decoding or reproducing the real-time demodulated data, or decoding the delayed demodulated data delayed by a specified time. A first user interface for controlling whether decoding and reproduction are performed in response to a user input, and a second user interface for controlling the reproduction processing speed of the fast-forward reproduction control means in response to a user input in a mode for decoding and reproducing the delayed demodulated data. A digital broadcast receiving / reproducing apparatus, comprising: 2. A digital broadcast receiving / reproducing apparatus according to claim 1, wherein in the mode for decoding and reproducing the delayed demodulated data, data of a delay time with respect to the real time of the video signal being decoded and reproduced is output.