JP2006041838A - Video recording and reproducing apparatus and television receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video recording apparatus the number of encoders installed in which is decreased so as to simplify the configuration and to provide a television receiver incorporating the recording apparatus. <P>SOLUTION: The video recording and reproducing apparatus comprises; two tuners 11, 12; a hard disk 32; a video audio composite section 30 respectively compressing a video signal and an audio signal from the two tuners and composing them; a video audio compression encoder 31 for respectively encoding the video signal and the audio signal composed by the video audio composite section 30 and storing the result to the hard disk 32; a video audio decoder 32 for reading and decoding the video signal and the audio signal stored in the hard disk 32; and a video audio separation section 34 for separating the video signal and the audio signal corresponding to a selected channel among the video signal and the audio signal obtained from the video audio decoder 32 and outputting the separated video signal and audio signal. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a multi-channel video recording / reproducing apparatus and a television receiver incorporating the same.

In recent years, video recorders that record video on a hard disk or DVD have become widespread, but when programs to be recorded overlap in the same time zone, only one of the programs can be stored. In view of this, devices that have a hard disk or DVD and a conventional tape recording device and that can record two programs at the same time with two tuners are sold. However, the conventional tape recording device is more convenient than the disk device. Quite inferior. In particular, tape preparation and cueing are necessary, compared to hard disk recording, which requires no awareness of the media at all. For this reason, a multi-channel recording / reproducing apparatus that includes a plurality of pairs of tuners and encoders and records simultaneously is proposed (for example, Patent Document 1).
JP-A-9-9193

  In the conventional multi-channel recording / reproducing apparatus (Patent Document 1), encoders are provided corresponding to a plurality of tuners. However, encoders for compressing moving images are expensive, and simultaneous recording that is performed only occasionally. For this reason, there is a problem that the price of the equipment becomes high.

  The present invention has been made to solve such problems, and provides a video recording / reproducing apparatus capable of simplifying the configuration by reducing the number of encoders installed and a television receiver incorporating the same. The purpose is to do.

  A video recording / playback apparatus according to the present invention includes a plurality of tuners, a storage unit, a video synthesis unit that compresses and synthesizes video signals from the plurality of tuners, and generates a video signal corresponding to one channel; A video encoder that encodes the video signal synthesized by the video synthesis unit and stores the encoded video signal in the storage unit; In the present invention, the video signals of a plurality of channels are compressed and combined to generate a video signal for one channel, and the video signal is encoded by a video encoder and then stored in a storage means (for example, a hard disk). Therefore, only one encoder is required. For this reason, simplification of the apparatus is achieved and the price of the product can be reduced.

  The video recording / reproducing apparatus according to the present invention includes a video decoder that reads and decodes a video signal stored in the storage unit, and a video signal corresponding to a selected channel among the video signals obtained from the video decoder. Video separation means for separating and outputting. In the present invention, the video signals of a plurality of channels are combined and stored in the storage means as a video signal for one channel. At the time of reproduction, the video signals corresponding to the selected channel are separated and output. As a result, the desired channel program can be enjoyed.

  The video recording / reproducing apparatus according to the present invention compresses and synthesizes a plurality of tuners, storage means, and video signals and audio signals from the plurality of tuners, respectively, and video and audio signals corresponding to one channel. A video / audio synthesizer for generating a video signal, a video / audio encoder synthesized by the video / audio synthesizer for encoding (encoding), and storing the video signal in the storage unit, and a video stored in the storage unit A video / audio decoder that reads and decodes a signal and an audio signal, and a video signal and an audio signal corresponding to a selected channel are separated from the video signal and the audio signal obtained from the video / audio decoder. Video / audio separation means for outputting. In the present invention, the video signals of a plurality of channels are compressed and synthesized, the audio signal is compressed and synthesized, and the synthesized video signal and audio signal for one channel are encoded by the video / audio encoder. Since it is stored in the storage means (for example, hard disk), only one encoder is required. For this reason, simplification of the apparatus is achieved and the price of the product can be reduced.

  The video recording / playback apparatus according to the present invention compresses and synthesizes two tuners, storage means, and video signals and audio signals from the two tuners, respectively, and video signals and audio corresponding to one channel. A video / audio synthesizing unit for generating a signal, a video / audio encoder for encoding the video signal and the audio signal synthesized by the video / audio synthesizing unit and storing them in the storage unit, and a video signal and an audio stored in the storage unit A video / audio decoder that reads and decodes the signal; and a video / audio separation unit that separates and outputs the video signal and the audio signal corresponding to the selected channel among the video signal and the audio signal obtained from the video / audio decoder; It is provided. In the present invention, at the time of storage, the video signals of the two channels are compressed and synthesized, and the audio signals of the two channels are compressed and synthesized to generate a video signal and an audio signal for one channel, Since the video signal and the audio signal are encoded by the video / audio encoder and stored in the storage means, only one encoder is required. For this reason, simplification of the apparatus is achieved and the price of the product can be reduced.

  In the video recording / reproducing apparatus according to the present invention, the video / audio synthesis means compresses and synthesizes the video signal in the horizontal direction.

  In the video recording / reproducing apparatus according to the present invention, the video / audio synthesizing unit converts the audio signal of each channel into a monaural signal to obtain an audio signal of the L channel and the R channel. In the present invention, since the audio signal of each channel is converted into a monaural signal to obtain the L channel and R channel audio signals, the conventional storage method can be used as it is during storage, and the processing is also performed. It is easy.

  In the video recording / playback apparatus according to the present invention, the video / audio separation means selects an L-channel or R-channel audio signal from the audio signals obtained from the video / audio decoder according to the selected channel. Output. In the present invention, since the audio signal of the L channel or the R channel is selected and output according to the selected channel, the audio signal separation process is simplified.

  A television receiver according to the present invention incorporates the above-described video recording / reproducing device, and realizes a low-cost product with a small number of encoders and decoders.

Embodiment 1. FIG.
FIG. 1 is a block diagram showing a configuration of a digital broadcast receiving apparatus according to Embodiment 1 of the present invention, in which a video recording / reproducing apparatus is integrated and incorporated. The digital broadcast receiver 1 includes an antenna 10, tuners 11 and 12, demultiplexers 13 and 14, video signal processing circuits 15 and 16, audio signal processing circuits 17 and 18, a drawing processing circuit 19, a video output circuit 20, and a display device. 21, an audio output circuit 22 and a speaker 23 are provided. The digital broadcast receiving apparatus 1 further includes a video / audio synthesis unit 30, a video / audio compression encoder 31, a hard disk 32, a video / audio decoder 33, and a video / audio separation unit 34, and an operation unit 41, an interface (IF). 42, a remote controller 43, a receiving unit 44, and a control unit 45. The tuner 11 to the video output circuit 20, the audio output circuit 22, the video and audio synthesis unit 30 to the video and audio separation unit 34, and the control unit 45 are connected via a bus 46, and the entire circuit is controlled by the control unit 45. ing. The control unit 45 includes a CPU 451, a ROM 452 in which programs to be executed by the CPU 451, fixed data, and the like are written, and a RAM 453 that functions as a work area of the CPU 451. It is assumed that the operation unit 41 and the remote controller 43 are provided with a key (not shown) for outputting a command signal such as a reproduction image selection signal in addition to a normal television key.

  The video / audio synthesizer 30 of the first embodiment is the video synthesizer or video / audio synthesizer of the present invention, the video / audio compression encoder 31 is the video encoder or video / audio encoder of the present invention, and the hard disk 32 is the memory of the present invention. The video / audio decoder corresponds to the video decoder or video / audio decoder of the present invention, and the video / audio separator 34 corresponds to the video separation means or video / audio separation means of the present invention.

  In the digital broadcast receiver 1 of FIG. 1, when the user selects a channel to be viewed by operating the operation unit 41 or the remote controller 43, a channel selection signal corresponding to the channel is generated, and the control unit 45 selects the channel selection. A signal is received via the interface 42 or the receiving unit 44 and the bus 46, and the control unit 45 outputs a channel selection signal to the tuner 11, for example, based on the channel selection signal, so that the channel is set in the tuner 11. The antenna 10 includes a frequency converter, receives a digital broadcast signal sent from, for example, CS (Communication Satellite), and outputs the frequency-converted signal to the tuner 11. The tuner 11 includes a demodulation circuit, a deinterleave circuit, an error correction circuit, and the like, and performs a process of extracting a signal having a specific frequency from a high-frequency digital modulation signal including video / audio data. That is, a process of selecting one from a plurality of transponders of digital broadcasting is performed. A demultiplexer (DEMUX) 13 separates the transport stream into a video stream of MPEG2 (Moving Picture Experts Group 2), an audio stream, and PSI / SI (Program Specific Information / Service Information), etc. The signal is output to the signal processing circuit 15 and the audio stream is output to the audio signal processing circuit 17. The PSI / SI is taken into the control unit 45 and processed as necessary.

  The video signal processing circuit 15 has a built-in video decoder and the like, decodes the input variable length code to obtain a quantization coefficient and a motion vector, performs rendering by performing inverse DCT transformation, motion compensation control based on the motion vector, and the like. Output to the processing circuit 19. The drawing processing circuit 19 is a circuit that generates a video signal (video data) based on character information and color information instructed to be output from the video signal processing circuit 115 and the CPU 451, and draws an odd field video and an even field video respectively. The rendered video signal is output to the video output circuit 20 alternately for each field. The video output circuit 20 receives the odd-field video signal and the even-field video signal from the drawing processing circuit 19 and performs D / A conversion, for example, converts them into a composite video signal and outputs the composite video signal to the display device 21. 21 displays an image based on the image signal.

  The audio signal processing circuit 17 incorporates an audio decoder or the like, decodes the input encoded signal to generate an audio signal (audio data), further D / A converts the audio signal, for example, right ( R) An analog signal of sound and an analog signal of left (L) sound are generated and output to the audio output circuit 22. The audio output circuit 22 amplifies the analog signals of the right (R) sound and the left (L) sound and outputs the amplified signals to the speaker 23, and the sound is obtained from the speaker 23.

  The configurations and functions of the tuner 12, the demultiplexer 14, the video signal processing circuit 16 and the audio signal processing circuit 18 are the same as those of the tuner 11, the demultiplexer 13, the video signal processing circuit 15 and the audio signal processing circuit 17 described above. The drawing processing circuit 19 selects either one of the video signal processing circuits 15 and 16 and outputs the selected video signal to the video output circuit 20, or sets one of the video signals as a main screen and the other video signal as a sub-screen. Are combined, drawn, and output to the video output circuit 20 (in this case, two screens for two channels are displayed on the display device 21). The audio output circuit 22 selects one of the audio signal processing circuits 17 and 18 and outputs it to the speaker 23. Note that the audio output circuit 22 outputs only the audio signal corresponding to the video signal of one of the channels even when two screens for two channels are displayed on the display device 21.

  Next, a case where two programs are simultaneously recorded in the digital broadcast receiving apparatus 1 of FIG. 1 will be described. When the user operates the operation unit 41 or the remote controller 43 to select two channels, the control unit 45 takes in the channel selection signal of the channel via the interface 42 or the reception unit 44, decodes it, and selects the tuners 11 and 12 Each of the tuners 11 and 12 sets a channel based on the channel selection signal. The outputs of the tuners 11 and 12 are signal-processed via the demultiplexers 13 and 14, the video signal processing circuits 15 and 16, and the audio signal processing circuits 17 and 18, respectively, as in the above case, and the video / audio synthesis unit Enter 30. The video / audio synthesizer 30 synthesizes the input video and audio signals of the two channels. That is, the video signals of the two channels are synthesized and the audio signals of the two channels are synthesized. As for the video signals of the two channels, the horizontal video signals are halved and combined to form a video signal for one screen. That is, the video signal of each channel is compressed in the horizontal direction to generate a video signal corresponding to ½ so far, and a video signal corresponding to one channel is generated by combining them. The audio signals converted into monaural signals are processed as L and R channel audio signals. The video / audio compression encoder 31 treats the video signal synthesized by the video / audio synthesis unit 30 as one video signal, and compresses and stores the synthesized video signal and audio signal in the hard disk 32.

  FIG. 2 is an explanatory diagram conceptually showing compression and synthesis by the video / audio synthesis unit 30. The video signal of channel 1 (ch1) and the video signal of channel 2 (ch2) are compressed in half in the horizontal direction, and the combined video signal is synthesized and compressed to the hard disk 32. Remember. When simultaneous recording is performed in this way, the horizontal resolution of each channel is half that of recording of only one channel. This corresponds to a long-time recording mode of a general hard disk recorder.

  FIG. 3 is a diagram showing a recording state of the hard disk 32. As shown in the figure, for example, when channel 1 (ch1) or channel 2 (ch2) is independently recorded, video signals of channel 1 (ch1) or channel 2 (ch2) are individually recorded. Also for the audio signal at this time, the L channel and R channel audio signals of the corresponding channels are stored in the audio L channel and audio R channel, respectively. In the case of simultaneous recording of channel 1 (ch1) and channel 2 (ch2), the compressed video signal of channel 1 (ch1) and channel 2 (ch2) is stored as the video signal. . As for the audio signal, the audio signal (L, R) of channel 1 (ch1) converted into a monaural signal is converted into an audio L channel, and the audio signal (L, R) of channel 2 (ch2) is converted into a monaural signal. Things are stored in the audio R channel. The hard disk 32 records information indicating whether the recording is single recording or simultaneous recording. Since it is instructed by the operation of the operation unit 41 or the like whether it is single recording or simultaneous recording, the information is obtained based on the instruction.

  The instruction to reproduce the recorded video by the operation unit 41 in FIG. 1 and the selection signal of the recorded video (for example, reproduction of the video of channel 1 (ch1) or channel 2 (ch2) in the above example (FIG. 2)). , The control unit 45 reads and analyzes the instruction, gives a control instruction to the video / audio decoder 33 to read and decode from the hard disk 32, and reproduces a video selection signal for the video / audio separation unit 34. (For example, select ch1). The video / audio decoder 33 reads and decodes the video signal and the audio signal from the hard disk 32 in the same manner as in the case of single recording, and outputs the decoded signal to the video / audio separation unit 34. Since the input signal from the video / audio decoder 33 includes information indicating that the playback video is simultaneous recording, the video / audio separation unit 34 receives video from the hard disk 32 based on the information and the playback video selection signal. In the signal, the selected video is separated and output. In the above example (FIG. 2), when the video signal of channel 1 (ch1) is selected from the synthesized video signal of channel 1 (ch1) and video signal of channel 2 (ch2), the signal from the hard disk 32 is selected. The video signal of channel 1 (ch1) is separated from the video signal (composite video) and output to the drawing processing circuit 19. The audio / video separation unit 34 separates and outputs the audio signal (L, R) from the hard disk 32 based on the reproduction video selection signal and corresponding to the selected video. In the above example (FIG. 2), when the video signal of channel 1 (ch1) is selected, the audio signal (audio L channel) of channel 1 (ch1) is selected from the audio signals (L, R) from the hard disk 32. And output to the audio output circuit 22.

  When the video signal is input from the video / audio separator 34, the drawing processing circuit 19 performs predetermined processing and outputs the video signal to the video output circuit 20. The video signal from the video / audio separator 34 is compressed in the horizontal direction. Therefore, the video signal is expanded in the horizontal direction to generate video signals of the odd field and even field, and the video output circuit 20 outputs the video signal for each field. The video output circuit 20 performs predetermined signal processing on the video signal to display the video on the display device 21. Further, when the audio output circuit 22 receives an audio signal from the video / audio separation unit 34, the audio signal is subjected to predetermined processing and output to the speaker 23, and this audio signal is a monaural signal. Audio corresponding to a monaural signal is output.

  As described above, in the present embodiment, the video signal and audio signal for two channels are compressed and stored in the hard disk 32 in the same manner as the video signal and audio signal for one channel, and the video / audio separation unit 34 is reproduced during reproduction. Since the video signal and audio signal of either channel are separated and output based on the playback video selection signal, simultaneous recording is possible even if only one video / audio compression encoder 31 is incorporated. It has become.

Embodiment 2. FIG.
In the above embodiment, an example of a digital broadcast receiving apparatus in which a video recording apparatus is integrated is described. However, the present invention is also applicable to a case where the video recording apparatus is a single unit, In this case, the drawing processing circuit 19, the video output circuit 20, the display device 21, the audio output circuit 22, and the speaker 23 are omitted in the example of FIG. Furthermore, the present invention is similarly applied not only to digital broadcasting but also to reception of analog broadcasting.

  Moreover, although the example which records on a hard disk as a recording medium was demonstrated, you may use other recording media, such as DVD. The display device may be any of a liquid crystal panel, a plasma display, a CRT, and the like. In the above-described embodiment, the example in which the video signal is compressed in the horizontal direction has been described. However, the video signal may be compressed in the vertical direction. Furthermore, although an example in which two tuners are installed has been described, the present invention can be similarly applied even when a plurality of three or more tuners are arranged.

1 is a block diagram showing a configuration of a digital broadcast receiving apparatus according to Embodiment 1 of the present invention. An explanatory view of composition and separation of a picture. The figure which showed the recording state to a hard disk.

Explanation of symbols

11, 12 Tuner, 13, 14 Demultiplexer, 15, 16 Video signal processing circuit, 17, 18 Audio signal processing circuit, 19 Drawing processing circuit, 20 Video output circuit, 21 Display device, 22 Audio output circuit, 23 Speaker, 30 Video / audio synthesis unit, 31 video / audio compression encoder, 32 hard disk, 33 video / audio decoder, 34 video / audio separation unit, 41 operation unit, 42 interface, 43 remote controller, 44 reception unit, 45 control unit, 46 bus.

Claims (8)

With multiple tuners,
Storage means;
Video synthesizing means for compressing and synthesizing video signals from the plurality of tuners, and generating video signals corresponding to one channel;
A video recording / reproducing apparatus comprising: a video encoder that encodes the video signal synthesized by the video synthesis means and stores the encoded video signal in the storage means. A video decoder that reads and decodes the video signal stored in the storage means;
A video recording / reproducing apparatus comprising: video separation means for separating and outputting a video signal corresponding to a selected channel among the video signals obtained from the video decoder. With multiple tuners,
Storage means;
Video and audio synthesis means for compressing and synthesizing video signals and audio signals from the plurality of tuners, and generating video signals and audio signals corresponding to one channel;
A video / audio encoder that encodes the video signal and the audio signal synthesized by the video synthesis unit and stores them in the storage unit;
A video / audio decoder that reads and decodes the video signal and the audio signal stored in the storage means;
Video recording / playback comprising video / audio separation means for separating and outputting the video signal and audio signal corresponding to the selected channel among the video signal and audio signal obtained from the video / audio decoder apparatus. With two tuners,
Storage means;
Video and audio synthesis means for compressing and synthesizing video signals and audio signals from the two tuners, respectively, and generating video signals and audio signals corresponding to one channel; and
A video / audio encoder that encodes the video signal and the audio signal synthesized by the video / audio synthesis unit and stores them in the storage unit;
A video / audio decoder that reads and decodes the video signal and the audio signal stored in the storage unit;
Video recording / playback comprising video / audio separation means for separating and outputting the video signal and audio signal corresponding to the selected channel among the video signal and audio signal obtained from the video / audio decoder apparatus.   5. The video recording / reproducing apparatus according to claim 3, wherein the video / audio synthesizing unit compresses and synthesizes the video signal in the horizontal direction.   6. The video recording / reproducing apparatus according to claim 3, wherein the video / audio synthesizing unit converts an audio signal of each channel into a monaural signal to obtain an audio signal of an L channel and an R channel.   7. The video / audio separation unit selects and outputs an L-channel or R-channel audio signal in accordance with a selected channel among audio signals obtained from the video / audio decoder. The video recording / reproducing apparatus as described. A television receiver comprising the video recording / reproducing apparatus according to any one of claims 1 to 7.

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