JP2012005052A - Video signal output device, video signal output method, and video signal recording system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique to eliminate a heavy load, which is caused when simultaneously performing recording (video recording) processing of a video signal, multiplexing processing of a partial transport stream (TS), and transcode processing in a video signal output device.SOLUTION: A video signal output device includes transcode processing means to receive a highly efficiently encoded video signal related to a predetermined video content and output the video signal after performing transcode processing thereon; partial transport stream (TS) generation means to receive a TS signal related to the predetermined video content and output a partial TS signal after generating it from the TS signal; and multiplexing means to output the video signal being performed the transcode processing thereon and the generated partial TS signal in a TS format after multiplexing them.

Description

  Embodiments described herein relate generally to a video signal output apparatus that receives a video signal, performs video processing, and outputs the video signal.

  In recent years, devices compatible with IEEE1394 have become widespread in digital television (DTV) and cable TV (CATV) receivers and video signal receivers such as DVDs.

  These video signal output devices, for example, receive digital video related to video content, generate a partial TS signal from a transport stream (TS) signal, and record (record) the digital video signal and the partial TS signal on a recording medium. To do.

  However, since the processing amount of the recording (recording) process itself is large, performing the recording (recording) process and the multiplexing process of the partial TS at the same time is a heavy load on the video signal output apparatus.

  Further, in recent years, a technique called transcode for converting a high-efficiency-encoded digital video to a high-efficiency encoding format with higher encoding efficiency without decoding has been spreading.

  By transcoding, for example, a digital video with a bit rate of 16 Mbps can be set to 8 Mbps. As described above, since the amount of video data can be reduced by transcoding, it is used for recording video.

  However, as described above, since the processing amount related to the recording (recording) process is large, performing the recording (recording) process and the transcoding process at the same time is a heavy load on the video output apparatus.

Further, simultaneous recording (recording) processing, partial TS multiplexing processing, and transcoding processing are further burdensome for the video output apparatus.
Also, in recent years, it has become possible to perform “round recording” in which a plurality of programs are received simultaneously and continuously recorded on a recording device, but a plurality of programs are continuously recorded (recorded) on the recording device. In such a case, a further heavy load is expected, and it has been a problem to solve this.

JP 2008-277880 A

  In a video signal output device, simultaneously performing video signal recording (recording) processing, partial TS multiplexing processing, and transcoding processing is a heavy load, and disclosure of a specific technique for solving this is desired. It was.

  The video output apparatus according to the embodiment includes transcode processing means for receiving a video signal that has been encoded with high efficiency according to predetermined video content, performing transcode processing on the video signal, and outputting the video signal.

  In addition, a partial TS signal generation unit is provided that receives a transport stream (TS) signal related to the predetermined video content, generates a partial TS signal from the TS signal, and outputs the partial TS signal.

  In addition, multiplexing means for multiplexing the video signal subjected to the transcoding process and the generated partial TS signal and outputting in a TS format is provided.

The figure which shows the external appearance of the video signal recording (video recording) system concerning embodiment. The block diagram explaining the video signal output device concerning an embodiment. The flowchart explaining the process of the video signal recording (video recording) system concerning embodiment.

Hereinafter, embodiments will be described with reference to the drawings.
FIG. 1 is a diagram showing an appearance of a video signal recording (recording) system according to the embodiment.
Here, an example of a digital television (DTV) is shown as an example, but the present invention can also be applied to a cable TV (CATV) receiver (STB) and a video signal receiver such as a DVD.

  Reference numeral 1 is a video signal receiving device (digital TV), reference numeral 2 is an antenna, reference numerals 3a, 3b, 3c, 3d, 3e, and 3f are tuners, reference numeral 4 is a signal processing unit, reference numeral 5 is a video processing unit, and reference numeral 6 is audio. Reference numeral 7 is a display processing unit, reference numeral 8 is a display device, reference numeral 9 is a speaker, reference numeral 10 is a bus, reference numeral 11 is a control unit, reference numeral 12 is an MPU, reference numeral 13 is a RAM, reference numeral 14 is a ROM, reference numeral 15 is Flash memory, reference numeral 16 is a recording apparatus, reference numeral 17 is an external interface, reference numeral 18 is an external recording apparatus, reference numeral 19 is an operation receiving unit, reference numeral 20 is an operating device (remote controller), reference numeral 21 is a transmission / reception unit, reference numeral 22 is a recorded program A table generation unit, reference numeral 23 is a program table creation unit, and reference numeral 26 is the Internet.

Reference numerals 25a and 25b denote broadcast stations that broadcast broadcast programs. A plurality of programs are broadcast from a plurality of broadcasting stations such as broadcasting stations 25a and 25b.
The antenna 2 is connected to a video display device (recording device) 1. Reference numerals 3a, 3b, 3c, 3d, 3e, and 3f are tuners. Here, a plurality of tuners are configured.
A plurality of programs (broadcast signals) broadcast in the form of broadcast waves from a plurality of broadcasting stations 25a, 25b, etc. are received by the antenna 2 and transmitted to the tuners 3a, 3b, 3c, 3d, 3e, 3f. The tuners 3 a, 3 b, 3 c, 3 d, 3 e, and 3 f select and receive a plurality of programs (broadcast signals) and output them to the signal processing unit 4.

  Here, the MPU 12 of the control unit 11 includes a tuner (3a, 3b, 3c, 3d, 3e, 3f), a signal processing unit 4, a video processing unit 5, an audio processing unit 6, a display processing unit 7, a RAM 13, a ROM 14, and a flash. The memory 15, the recording device 16, the external interface 17, the operation receiving unit 19, the operating device (remote controller) 20, and the transmission / reception unit 21 are connected via the bus 10 and controlled.

  The signal processing unit 4 performs decoding processing simultaneously (in parallel) on video signals related to a plurality of programs that are selected by the tuners 3a, 3b, 3c, 3d, 3e, and 3f and transmitted simultaneously (in parallel). A video signal is output to the recording device 16 in a port stream (TS) format.

The recording device 16 is a large-capacity recording device (video signal storage device) having a recording (recording) medium such as an HDD or an SSD, and is configured inside the video display device 1 here.
The recording device 16 continuously receives video signals transmitted in the format of the transport stream (TS), and records all of the received broadcast programs on the recording device 16 (round recording).

  The video signal cut out (extracted) from the video signal designated by the user and “round-recorded” is decoded by the signal processing unit 4 to extract and output the audio signal and the video signal, respectively. The audio signal is output to the audio processing unit 6. The video signal is output to the video processing unit 5.

The audio processing unit 6 decodes the output audio signal and outputs it to the speaker 9. The speaker 9 receives the decoded audio signal, converts it into audio, and outputs it.
The video processing unit 5 decodes the output video signal and outputs it to the display processing unit 7. The display processing unit 7 performs display processing such as color and display position and outputs the display processing 8. The display device 8 receives the display-processed video signal and displays it on a display unit such as a display panel (not shown).

  In this embodiment, an external recording device 18 having a storage medium such as an HDD or SSD is connected to the outside of the video display device 1 via the external interface 17 and used in the same manner as the upper recording (recording) image device 16. It is possible.

Further, an operation device 20 such as a remote controller or a keyboard is connected via the operation receiving unit 19, and a user operation of the video display device 1 is possible.
Further, it is connected to the Internet 26 via the transmission / reception unit 21 and can perform Internet communication.
FIG. 2 is a block diagram of a video signal receiving apparatus (digital TV) according to the embodiment.
Reference numeral 3 denotes a tuner, reference numeral 400 denotes a demodulator, reference numeral 100 denotes a transcoder, reference numeral 200 denotes a recording control unit, and reference numeral 16 denotes a recording device that records (records) a digital video signal (TS).

In this embodiment, the transcoder 100 and the recording control unit 200 are configured separately.
Here, the tuner 3 will be described using an example, but the tuner 3 may have a plurality of configurations as described above.
A digital video is transmitted by, for example, a digital broadcast wave and received by the tuner 3. The digital broadcast wave received here is demodulated by the demodulator 400, and a transport stream (TS) defined by MPEG is extracted and output.

The TS output from the demodulator 400 is input to the transcoder 100.
The transcoder 100 converts digital video (video data) from, for example, MPEG2 format to H.264. Transcode to H.264 format and output. As described above, the transcoding process is a technique for converting digital video into another encoding format.

  As will be described below, the partial video signal (video data) transcoded by the transcoder 100 is multiplexed with the partial TS signal and input to the recording control unit 200.

The recording control unit 200 records (records) the input digital video (TS) in the recording device 16 such as an HDD device.
Next, the configuration of the transcoder 100 will be described.
Reference numeral 101 denotes a TS input unit to which a TS packet is input, reference numeral 102 denotes a demax processing and descrambling processing unit, reference numeral 103 denotes a transcoding processing unit, reference numeral 104 denotes a delay buffer, reference numeral 105 denotes a PSI processing unit, and reference numeral 106 denotes a remux process. , 107 is a TS output unit, 108 is a host interface, and 109 is a control unit.

The TS input unit 101 receives the digital broadcast received by the tuner 3 and outputs it to the demax processing and descrambling processing unit 102.
The demax processing and descrambling processing unit 102 receives the digital broadcast, and information such as a PID (Packet ID) and a scramble key is set from the recording control unit 200 via the host interface 108.

  Then, based on information such as a PID (Packet ID) and a scramble key set from the recording control unit 200, a demax process and a descramble process are performed, and a digital video (video data) and a TS signal are extracted and output.

  At this time, for example, digital video (video data) and a TS signal related to the program instructed to be recorded by the user are extracted. The number of programs instructed to be recorded is not limited to one. For example, in the case of “round recording”, it is possible to simultaneously extract a plurality of programs that are received continuously. Here, for example, digital video (video data) is in the MPEG2 format.

  The transcode processing unit 103 receives MPEG2 format digital video (video data), and, for example, from the MPEG2 format to H.264 according to the setting from the recording control unit 200. Transcode processing is performed in the H.264 format, and the transcoded digital video (video data) is output to the Remux processing unit 106.

  Further, the PSI processing unit 105 receives the TS signal extracted by the demax processing and descrambling processing unit 102, and acquires PSI information (Program Specific Information) from the TS signal.

The PSI processing unit 105 creates a partial TS signal (including SIT and DIT) of the program designated by the user from the acquired PSI information.
The PSI processing unit 105 filters and holds CAT and EMM from the TS signal.
In addition, the PSI processing unit 105 acquires PAT, PMT, and ECM, and outputs them to the recording control unit 200 via the host interface 108 and the host interface 206.

  The PSI information is called program specifying information and is information necessary for selecting a program. This is the basic information of digital broadcasting that consists of PAT, NIT, PMT, and CAT.

PAT is an abbreviation for program allocation table. Contains the PMT PID in the TS.
NIT stands for Network Information Table. Information on all channels in the network and frequency information are described.
PMT is an abbreviation for program map table. This is information such as video, audio, data, etc. for one channel.
CAT is an abbreviation for Condition Access Table. Information on conditional access.
SIT is an abbreviation for Selection Information Table. Information of a program transmitted in a partial transport stream (ILINK TS output from D-VHS) is described.

DIT is an abbreviation for discontinuity information table. It is inserted into the discontinuous part of the partial TS.
EMM is an abbreviation for Entitlement Management Message. This is contract information for each subscriber.
ECM is an abbreviation for Entitlement Control Message. Information such as program information, descrambling key, scramble ON / OFF, etc. is described.
Also, TS packets for audio, subtitles, data broadcasting, etc. are temporarily held in the delay buffer 104.
The transcode processing unit 103 performs H.264. The video signal (video data) transcoded in the H.264 format, the partial TS signal (including CAT and EMM) created by the PSI processing unit 105, and the TS packet held in the delay buffer 104 are remuxed. Multiplexed by the unit 106, and the multiplexed signal is output from the TS output unit 107 in the TS format.

  Here, the control unit 109 includes a TS input unit 101, a demax processing and descrambling processing unit 102, a transcode processing unit 103, a delay buffer 104, a PSI processing unit 105, a Remux processing unit 106, a TS output unit 107, and a host interface 108. Control etc.

  Reference numeral 201 denotes a TS input section, reference numeral 202 denotes a TS processing section, reference numeral 203 denotes a recording processing section, reference numeral 204 denotes a recording apparatus IF, reference numeral 205 denotes a CAS management section, reference numeral 206 denotes a host interface, and reference numeral 207 denotes a control section.

The TS input unit 201 receives the multiplexed video signal (TS packet) output in the TS format from the TS output unit 107 and outputs it to the TS processing unit 202.
The TS processing unit 202 receives the multiplexed video signal (TS packet) and performs a filtering process. Then, TS packets in the EMM section other than the EMM common message are deleted and output to the recording processing unit 203.

The recording processing unit 203 records (records) the video signal (TS packet) output from the TS processing unit 202 in the recording device 16 via the recording device IF 204.
Here, the control unit 207 controls the TS input unit 201, the TS processing unit 202, the recording processing unit 203, the recording device IF 204, the CAS management unit 205, the host interface 206, and the like.

  In addition, the recording control unit 200 receives the ECM output via the host interface 108 of the transcoder 100 via the host interface 206 and outputs it to the CAS management unit 205.

  The CAS management unit 205 acquires a descrambling key based on the received ECM and sets it in the demax processing and descrambling processing unit 102 of the transcoder 100 via the host interface 206 and the host interface 108.

  Similarly, when the CAS management unit 205 receives the PAT and PMT, the CAS management unit 205 sets PID information necessary for the Demux processing in the demax processing and descrambling processing unit 102 of the transcoder 100.

As described above, in this embodiment, the transcoder 100 and the recording control unit 200 are configured separately, for example, as different IC chips.
Then, the transcoder 100 receives a highly efficient encoded video signal (MPEG2 format) relating to a predetermined video content, performs transcoding processing on the video signal, and performs H.264 encoding. Transcode processing to convert to H.264 format and output is performed.

  Further, the transcoder 100 performs processing for receiving a transport stream (TS) signal related to the predetermined video content, and generating and outputting a partial TS signal from the TS signal.

  In addition, the transcoder 100 performs a multiplexing process for multiplexing and outputting the video signal subjected to the transcoding process and the generated partial TS signal.

  In addition, the recording control unit 200 receives a signal obtained by multiplexing the transcoded video signal and the partial TS signal output from the transcoder 100, and records the multiplexed signal on a recording medium. To control.

  With this configuration, the transcoder 100 can perform transcoding processing that is a load on the video output apparatus and multiplexing processing of the partial TS.

Then, the recording control unit 200 separate from the transcoder 100 can receive the multiplexed signal and control to record the signal on a recording medium.
As a result, the load on the recording control unit 200 can be reduced, and the load on the video signal output device can be reduced.
This also makes it possible to reduce the load when a plurality of programs are continuously received and recorded, for example, as in the above “round recording”.
FIG. 3 is a flowchart for explaining processing of the video signal recording (recording) system according to the embodiment. It is.
Reference sign S100 is a start step here. Then, it progresses to the step which attached code | symbol S101.
A code S101 is a step of receiving a digital broadcast signal (a video signal encoded in the MPEG2 format). Subsequently, the process proceeds to the step denoted by reference numeral S102.
Reference numeral S102 is a step of performing a descrambling process on the received digital broadcast. Then, it progresses to the step which attached | subjected code | symbol S103.
Reference numeral S103 is a step of selecting a program to be recorded in the recording device 16 instructed in advance by the user. Then, it progresses to the step which attached | subjected code | symbol S104.
A code S104 is a step of transcoding the video signal related to the selected program and compressing the information amount (MPEG2 format → H.264 format). Subsequently, the process proceeds to the step denoted by reference numeral S105.

  Symbol S105 is a step of generating a partial TS signal necessary for the program from the TS signal related to the video signal of the descrambled designated program. Then, it progresses to the step which attached | subjected code | symbol S106.

  Reference numeral S106 denotes the above H.264 standard. In this step, the video signal compressed in the H.264 format and the generated partial TS signal are multiplexed and output from the transcoder 100 to the recording control unit 200. Then, it progresses to the step which attached | subjected code | symbol S107.

The code S107 receives the multiplexed signal output from the transcoder 100 by the recording control unit 200,
This is a step of controlling recording on the recording apparatus 500. Then, it progresses to the step which attached | subjected code | symbol S108.
Reference numeral S108 is an end step, and the processing here ends.
In the above embodiment, the transcoder 100 and the recording control unit 200 are configured separately.
The transcoder 100 performs transcode processing, partial TS extraction, and partial TS multiplexing processing, and the recording control unit 200 performs recording control of the multiplexed signal output from the transcoder 100.

As a result, it is possible to reduce the loads on the transcoder 100 and the recording control unit 200, and it is possible to reduce the load on the video signal output device.
Further, even when a plurality of programs are continuously received and recorded, the load can be reduced.
Note that the above embodiment is not limited to the description itself, and in the implementation stage, the constituent elements can be variously modified and embodied without departing from the spirit of the invention.

  DESCRIPTION OF SYMBOLS 1 ... Video signal receiver (digital TV), 100 ... Transcoder, 200 ... Recording control part, 101 ... TS input part, 102 ... Demax processing and descrambling part, 103 ... Transcode processing part, 104 ... Delay buffer, DESCRIPTION OF SYMBOLS 105 ... PSI processing part, 106 ... Remux processing part, 107 ... TS output part, 108 ... Host interface, 109 ... Control part, 201 ... TS input part, 202 ... TS processing part, 203 ... Recording processing part, 204 ... Recording apparatus IF, 205 ... CAS management unit, 206 ... host interface, 207 ... control unit, 3 ... tuner, 400 ... demodulator, 16 ... recording device.

Claims (5)

Transcoding processing means for receiving a highly efficient encoded video signal relating to predetermined video content, performing transcoding processing on the video signal, and outputting the video signal;
A partial TS signal generation means for receiving a transport stream (TS) signal related to the predetermined video content, generating a partial TS signal from the TS signal, and outputting the partial TS signal;
A video signal output device comprising multiplexing means for multiplexing the transcoded video signal and the generated partial TS signal in TS format and outputting them.   Continuously receiving high-efficiency encoded video signals related to a plurality of video contents, generating the transcode process and the partial TS signal, the video signal subjected to the transcode process, and the generated partial TS signal The video signal output apparatus according to claim 1, wherein the multiplexing is performed on video signals related to a plurality of video contents. The video signal output device according to claim 1 or 2,
A video signal output from the video signal output device in the TS format and multiplexed with the transcoded video signal and the generated partial TS signal is received, and the multiplexed signal is recorded on the recording medium. A video signal recording system comprising recording control means for controlling the recording to be performed.   The video signal output device and the recording control means are configured separately, and a signal in which the transcoded video signal output from the video signal output device and the generated partial TS signal are multiplexed. The video signal recording system according to claim 3, wherein the recording control means receives and controls to record on a recording medium. Receiving a high-efficiency encoded video signal related to predetermined video content, transcoding the video signal, and outputting the video signal;
Receiving a transport stream (TS) signal related to the predetermined video content, generating and outputting a partial TS signal from the TS signal;
A video signal output method comprising the step of multiplexing the transcoded video signal and the generated partial TS signal and outputting in a TS format.

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