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WO2007000084A1 - Recepteur numerique de television et son procede de transmission de signal - Google Patents

Recepteur numerique de television et son procede de transmission de signal Download PDF

Info

Publication number
WO2007000084A1
WO2007000084A1 PCT/CN2005/002228 CN2005002228W WO2007000084A1 WO 2007000084 A1 WO2007000084 A1 WO 2007000084A1 CN 2005002228 W CN2005002228 W CN 2005002228W WO 2007000084 A1 WO2007000084 A1 WO 2007000084A1
Authority
WO
WIPO (PCT)
Prior art keywords
module
host
channel
digital television
transport stream
Prior art date
Application number
PCT/CN2005/002228
Other languages
English (en)
Chinese (zh)
Inventor
Guozhong Wang
Zhaolin Jiang
Gang Hou
Original Assignee
Central Research Academy Of Sva Group
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Central Research Academy Of Sva Group filed Critical Central Research Academy Of Sva Group
Publication of WO2007000084A1 publication Critical patent/WO2007000084A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream decryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
    • H04N21/4181—External card to be used in combination with the client device, e.g. for conditional access for conditional access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation

Definitions

  • the present invention relates to a digital television receiver and a signal transmission method thereof, and more particularly to a digital television receiver with a separate channel and a signal transmission method thereof. Background technique
  • Figure 1 shows a modular structure of a conventional "machine-card separation" digital television receiver: comprising a host ⁇ and a card module 2', wherein the host ⁇ includes: a tuner 15' for receiving an RF input, a demodulation module 16' connected to the tuner 15', a microprocessor 1 receiving a remote controller signal, a demultiplexing module 14', an MPEG-2 decoding module 13' connected to the demultiplexing module 14', The decoding module 13' outputs video and audio.
  • the host ⁇ includes: a tuner 15' for receiving an RF input, a demodulation module 16' connected to the tuner 15', a microprocessor 1 receiving a remote controller signal, a demultiplexing module 14', an MPEG-2 decoding module 13' connected to the demultiplexing module 14', The decoding module 13' outputs video and audio.
  • the card module 2' includes: a card microprocessor 2A bidirectionally connected to the host microprocessor 1A, and a descrambler 22' that receives the scrambled TS stream transmitted by the demodulation module 16', the descrambler 22' The descrambled TS stream is transmitted to the demultiplexing module 14'.
  • the card may also be provided with (or may not be provided with) an IC card 23', which is mainly used for storing security information such as a key and an authorization, and may be embedded in the card module 2' or may be resident. Stay in an additional detachable module, such as a smart card.
  • the transport stream interface should be daisy-chained, as shown in Figure 2.
  • the host ⁇ is responsible for maintaining the command interface connection, and the session between the card module and the host can be handled independently. Removing a card module 2 does not affect the connection of the command interface transport layer and other modules.
  • the host can select the relevant card module 2' according to the selected service type.
  • the technical problem to be solved by the present invention is to provide a lane separation digital television receiver and a signal transmission method thereof, which can separate channel decoding and source decoding, and can more flexibly receive and descramble multiple standards (such as satellite, Digital TV for cable, terrestrial and communication networks, etc.).
  • the technical solution adopted by the present invention is:
  • a digital television receiver comprising: a host, a card module, and a track module: the track module is configured to receive a television signal of a digital television standard, parse the transport stream, and transmit the transport stream to the host;
  • the host module, the channel module, and the card module are separated from each other, and the track module and the host respectively have corresponding interfaces and are detachably connected through the interface.
  • a signal transmission method for a digital television receiver is provided: after the channel is decoded by the channel module, the transport stream is parsed, and the transport stream is transmitted to the host through the interface, and then descrambled by the card module. Finally, the source decoding is performed by the host, and the track module, the card module, and the host are separated from each other.
  • the invention can effectively reduce the cost and promote the large-scale production; is beneficial to the development of multi-level new products, and forms a rich product line of digital television products; the universality of the digital television products is greatly enhanced; the user can flexibly select according to the needs, and the user is convenient to use. You don't have to buy multiple set-top boxes, you don't have to change the set-top boxes for different operators, and you don't have to operate multiple remotes. BRIEF DESCRIPTION OF THE DRAWINGS
  • 1 is a block diagram showing the structure of a conventional "machine card separation" digital television receiver.
  • 2 is a schematic diagram of a transmission stream interface chain between existing digital television receiver modules.
  • FIG. 3 is a block diagram showing the structure of a channel-separated digital television receiver of the present invention.
  • Figure 4 is a schematic view showing the structure of the bridge module shown in Figure 3.
  • FIG. 5 is a schematic diagram of the inter-module transport stream interface chain of the present invention. The best way to implement the invention
  • the digital television receiver of the present invention comprises: a host 1, a card module 2, and a track module 3: it is configured to receive a television signal of a certain digital television standard, parse the transport stream, and transmit the transport stream to the host 1;
  • the host 1, the channel module 3, and the card module 2 are separated from each other, and the track module 3 and the host 1 There are corresponding interfaces and detachable connections through the interfaces.
  • the host 1 includes:
  • the host microprocessor 11 is configured to receive a remote control signal sent by the remote controller, control the cooperative operation of each circuit module in the host 1, and is responsible for communication with the track module 3 and the card module 2.
  • the bridge module 12 is used to identify the track module 3 or the card module 2, and adaptively provides a corresponding bus protocol (such as CardBus, 16bit pc card, USB, Common Interface) to communicate with the track module 3 or the card module 2, in multiple modules.
  • a corresponding bus protocol such as CardBus, 16bit pc card, USB, Common Interface
  • An MPEG decoding module 13 for decoding and video and audio output of a compressed source; a demultiplexing module 14 for parsing the selected video or audio stream or data stream, and transmitting a signal to the MPEG decoding module 13 .
  • the host 1 may also (or may not include):
  • the tuner 15 which receives the RF input signal, is used for channel selection and frequency conversion;
  • the channel decoding module 16 receives the intermediate frequency signal output by the high frequency head 15 and transmits the channel decoded transmission stream signal to the bridge module 12.
  • the external track module 3 must be different from the built-in track module, such as a built-in wired channel module. , the external ground or satellite channel module; the built-in satellite channel module, the external wired or ground channel module. .
  • the track module 3 is configured to receive a television signal of a certain digital television standard, parse the transport stream, and transmit the transport stream to an interface corresponding to the host 1 (eg, CardBus, 16bit pc card, USB, Common Interface) Host 1.
  • the road module 3 includes:
  • a tuner 31 that receives an RF input signal for channel selection and frequency conversion
  • the channel decoding module 32 receives the intermediate frequency signal output by the tuner, demodulates the selected intermediate frequency signal, and finally outputs the transport stream (TS stream);
  • the interface adapter 33 receives the transport stream signal decoded by the channel decoding module 32 and transmits the signal to the bridge module 12 of the host 1.
  • the interface of the host 1 provided by the interface adapter 33 in the specific embodiment may be 32.
  • the card module 2 is configured to receive the scrambled TS stream, extract data required for the conditional access module to descramble the corresponding program or service, and selectively descramble the TS packet of the transport stream.
  • the descrambled TS stream is transmitted to the host 1.
  • the interface between the card module 2 and the host 1 may be a public interface or a USB, and the card module 2 includes:
  • the card microprocessor 21 is bidirectionally coupled to the host microprocessor 11 for communication with the host microprocessor 11 and for control and scheduling within the card module 2.
  • the descrambler 22 receives the scrambled TS stream transmitted by the bridge module 12, selectively descrambles the TS packet of the transport stream, and transmits the descrambled TS stream to the demultiplexing module 14.
  • the bridge module 12 of the present invention includes:
  • the transport stream data buffer 121 is used to temporarily store the transport stream data input by the track module 3.
  • the first host adapter 122 is configured to identify the inserted channel module 3 or the card module 2, provide an interface protocol corresponding to the plug-in module, and communicate with the module, and adaptively provide a suitable transport stream under the control of the host microprocessor 11. path.
  • the second host adapter 123 is configured to identify the inserted channel module 3 or the card module 2, provide an interface protocol corresponding to the plug-in module, and communicate with the module, and adaptively provide a suitable transport stream under the control of the host microprocessor 11. path.
  • the host adapters 122, 123 within the bridge module 12 can be bus controllers or USB hubs that automatically recognize whether the inserted channel module 3 or the card module 2 is present and provide a corresponding interface protocol.
  • the bridge module 12 communicates with each module under the control of the host microprocessor 11, and reads the scrambled transport stream data from the selected track module 3 temporarily stored in the transport stream data buffer 121, and then from the buffer.
  • the scrambled transport stream data is read out in 121 and transmitted to the selected card module 2 for descrambling, and then the descrambled transport stream data is transferred to the demultiplexing module 14 in the host 1.
  • Both host adapters should be able to identify and support the channel module 3 and the card module 2.
  • Each host adapter should be able to support multiple modules of the same type, but different types of modules should correspond to different host adapters.
  • the bridge module 12 of the host 1 should include at least 8K TS transport stream data buffer 121.
  • This buffer 121 follows the principle of first in first out, which should have two loop count pointers respectively representing the head and tail storage units, only at the same time. Can have a host adapter to read or write to it.
  • the bridge module 12 can provide an external input interface for the TS transport stream to accept TS stream data from the channel decoder if the host system contains an RF receive module.
  • the "channel separation" digital television receiver of the present invention may or may not have a display device Ready (such as the display).
  • the present invention further provides a signal transmission method based on the above digital television receiver: after the transmission data stream is channel-decoded by the channel module 3, the transport stream is parsed, and the transport stream is transmitted to the host 1 through the interface, and then the card is transmitted.
  • Module 2 performs descrambling, and finally performs source decoding via host 1, and the track module 3, card module 2, and host 1 are separated from each other.
  • the track module 3 receives the scrambled transport stream data and reads the data into the buffer 121 in the bridge module 12 of the host 1;
  • the scrambled transport stream data is read from the buffer 121 and transmitted to the selected card module 2 for descrambling;
  • the demultiplexing module 14 parses out the selected audio/video code or data stream to the MPEG decoding module 13 of the host 1;
  • the MPEG decoding module 13 performs source decoding to obtain an uncompressed audio/video stream or data stream, which is then output or sent to a display device for display.
  • the CI transport stream interface should be daisy-chained.
  • the host 1 uniquely selects one RF receiving module (the channel module 3 or the RF receiving module of the host 1) to work. As shown in Figure 5.
  • the host 1 is responsible for maintaining the connection of each module, and the session between the module and the host 1 can be handled independently. Removing a module should not affect the connection of the command interface transport layer and other modules.
  • host 1 can select or bypass related modules according to the selected service type. Specifically: When there are multiple modules, for the card module 2, the transport stream interface should be daisy-chained. For the channel module 3, only one channel module 3 can receive the TV signal at the same time.
  • the selected track module 3 should be bypassed to avoid disconnection of the transport stream path.
  • the channel module 301 receives the television signal, and the transport stream received by the channel module 301 passes through the respective card modules 201, 202, ... 20n in a daisy chain manner, but bypasses the unselected channel module. 302.
  • the embodiment of the separation principle of the present invention is directed to the separation of the machine card.
  • the digital television receiver can be applied to a digital television receiver in which the card is not separated without the need for creative labor. It should be understood that these modifications or changes do not depart from the scope of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

L'invention concerne un récepteur numérique de télévision et son procédé de transmission de signal, dans lequel le flux des données de transmission est tout d'abord décodé grâce à un module de canal et traduit en un flux de transmission, puis le flux de transmission est transmis à une machine principale par l'intermédiaire d'interfaces et désembrouillé par un module de cartes. Enfin, le flux désembrouillé est décodé en code source par la machine principale. Le module de canal, le module de cartes et la machine principale sont séparés mutuellement. Cette invention peut réduire efficacement le coût, elle peut faciliter la production en grands volumes et présente de grands avantages pour développer de nouveaux produits hiérarchiques ainsi que pour établir des lignes de fabrication pour des produits de télévision numérique à débouchés multiples. En outre, dans l'invention, un utilisateur peut faire sa sélection de manière plus souple en fonction de ses exigences sans avoir à acheter plusieurs décodeurs, à changer le décodeur pour différents fournisseurs de services ni à actionner plusieurs télécommandes. Donc l'invention est très pratique pour l'utilisateur.
PCT/CN2005/002228 2005-06-29 2005-12-16 Recepteur numerique de television et son procede de transmission de signal WO2007000084A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200510027219.1 2005-06-29
CNB2005100272191A CN100433805C (zh) 2005-06-29 2005-06-29 一种数字电视接收机及其信号传递方法

Publications (1)

Publication Number Publication Date
WO2007000084A1 true WO2007000084A1 (fr) 2007-01-04

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PCT/CN2005/002228 WO2007000084A1 (fr) 2005-06-29 2005-12-16 Recepteur numerique de television et son procede de transmission de signal

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CN (1) CN100433805C (fr)
WO (1) WO2007000084A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140094419A1 (en) * 2009-09-23 2014-04-03 Alcon Research Ltd. Injectable aqueous ophthalmic composition and method of use therefor
CN109743573A (zh) * 2018-12-29 2019-05-10 深圳Tcl新技术有限公司 媒体播放方法、装置、智能终端及计算机可读存储介质

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101296331B (zh) * 2007-04-24 2011-11-09 深圳Tcl新技术有限公司 一种播放装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04351088A (ja) * 1991-05-28 1992-12-04 Mitsubishi Electric Corp 有料放送受信装置
GB2261580A (en) * 1991-11-09 1993-05-19 David Arends Improvements in or relating to the decoding of signals

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100677091B1 (ko) * 2000-05-06 2007-02-05 삼성전자주식회사 기능 확장이 가능한 멀티미디어기기 및 그를 이용한 기능확장방법
JP2002044638A (ja) * 2000-07-28 2002-02-08 Sony Corp ディジタル放送受信装置およびディジタル放送受信方法
CN1455590A (zh) * 2003-06-23 2003-11-12 于劲飞 一种实现数字电视/数字电视机顶盒机卡分离的方法
CN2807648Y (zh) * 2005-06-29 2006-08-16 上海广电（集团）有限公司中央研究院 一种数字电视接收机

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04351088A (ja) * 1991-05-28 1992-12-04 Mitsubishi Electric Corp 有料放送受信装置
GB2261580A (en) * 1991-11-09 1993-05-19 David Arends Improvements in or relating to the decoding of signals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140094419A1 (en) * 2009-09-23 2014-04-03 Alcon Research Ltd. Injectable aqueous ophthalmic composition and method of use therefor
CN109743573A (zh) * 2018-12-29 2019-05-10 深圳Tcl新技术有限公司 媒体播放方法、装置、智能终端及计算机可读存储介质

Also Published As

Publication number Publication date
CN1889639A (zh) 2007-01-03
CN100433805C (zh) 2008-11-12

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