WO2002065770A1 - Microcircuit permettant l'obtention de video a la demande instantane sur un reseau de teledistribution analogique a direction de conduite - Google Patents

Microcircuit permettant l'obtention de video a la demande instantane sur un reseau de teledistribution analogique a direction de conduite Download PDF

Info

Publication number
WO2002065770A1
WO2002065770A1 PCT/CN2001/001161 CN0101161W WO02065770A1 WO 2002065770 A1 WO2002065770 A1 WO 2002065770A1 CN 0101161 W CN0101161 W CN 0101161W WO 02065770 A1 WO02065770 A1 WO 02065770A1
Authority
WO
WIPO (PCT)
Prior art keywords
controller
data
buffer
demand
stream
Prior art date
Application number
PCT/CN2001/001161
Other languages
English (en)
Chinese (zh)
Inventor
Zhongquan Xu
Naifeng Xu
Wei FENG
Aixi Zhu
Hong Zhu
Xianfeng Xu
Guangmeng Chen
Shiying Luo
Original Assignee
Sarft Dszheng Information Scimce Science & Technology Co., Ltd.
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 Sarft Dszheng Information Scimce Science & Technology Co., Ltd. filed Critical Sarft Dszheng Information Scimce Science & Technology Co., Ltd.
Publication of WO2002065770A1 publication Critical patent/WO2002065770A1/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
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications

Definitions

  • Chip for realizing video on demand on cable unidirectional network
  • the present invention relates to an integrated circuit chip, and in particular, to a chip used in a current one-way network of a cable television to implement user-side program on-demand and a video on-demand on a cable television one-way network.
  • RF input signal passes through the tuner, selects the channel, because the analog signal is transmitted on the network (HFC), so digital-to-analog conversion is added, and it is demodulated by QAM. Digital signal. After de-multiplexing, the video stream is converted into a program stream, and then video and audio decoding, encoding, and output are performed.
  • the purpose of the present invention is to overcome the shortcomings of the existing two-way cable TV network on-demand complex structure and large equipment investment, and provide an on-demand on-demand by using the existing one-way cable TV network structure.
  • the chip with the expanded coverage and unlimited capacity, easy on-demand, convenient and fast, is used in the set-top box of the client to realize the video on-demand on-demand on the cable unidirectional network.
  • the technical solution for achieving the purpose of the present invention is: a chip for realizing video on demand on a unidirectional network of cable television, which is characterized by including a switch channel controller, a process controller, an arithmetic processor, an SDRAM controller and SDRAM, and data RAM (temporary storage) sending controller, and input / output interface;
  • the switch channel controller is used for identifying program video signals or other signals, and selecting The required video signal is sent to the process controller through the channel, and the signal not required by the user is sent to the motherboard through the output interface;
  • the process controller receives the stream data packet output from the switch channel controller, and compares the received data packet The segment number is larger than the segment number of the currently playing data packet.
  • the arithmetic processor is used to send the code stream at a constant speed, and a reference clock is used to control the code stream transmission.
  • the data RAM temporary storage transmission controller, wherein the data RAM is used to remove the header of the data stream, and then send the The controller sends it to the memory allocation table, and the memory allocation table quickly finds the segment number of the pre-cast data stream; the SDRM controller and the SDRAM are used to read and write control the data output by the process controller, and the SDRAM is used as the data stream Buffer, the data retrieved from the buffer is played slowly and written quickly to achieve the on-demand effect.
  • FIG. 1 is a schematic diagram of a circuit principle of the present invention.
  • FIG. 2 is a schematic diagram of a signal flow direction of the present invention.
  • FIG. 3 is a schematic flow chart of the working principle when the present invention is used in a set-top box. Best Mode of the Invention
  • the on-demand on-demand chip is the core component of the set-top box to realize on-demand on-demand under the condition of unidirectional network. It is set between the common receiving digital video, information broadcasting set-top box's tuner QAM decoding and browsing motherboard.
  • the chip for realizing video on demand on a unidirectional network of cable television of the present invention includes a switch channel controller, a process controller, a computing processor, an SDRAM (buffer) controller, a buffer (SDR I), and a data RAM (temporary storage). Sending controller, and input and output interfaces.
  • the switch channel controller is used to identify the program video signal or other signals, and send the useful video signal to the process controller.
  • the process controller compares the size of the data packet segment number, accesses it in the data buffer module, and sends it through the sending controller.
  • the data stream is continuously and smoothly output to achieve the on-demand effect. among them:
  • the switch channel controller receives the digital signal selected by the tuner channel and demodulated by QAM, and identifies whether it is a user video-on-demand signal or other information. If it is a video-on-demand signal, let the signal enter the V0D process control. Device. If not, the signal goes straight from the input port to the STB browser board (motherboard).
  • the code stream data packet sent by the process controller from the switch channel controller is transmitted according to a pre-programmed code stream table, and the code stream table is based on the length of the on-demand program and the size of the buffer capacity. , And download speed, waiting time and other factors.
  • the process controller receives a data packet with a segment number i. If i is smaller than the currently played segment number (indicating that it has been output), the segment is discarded, and the next one is received.
  • i is greater than the currently played segment number, If it is large, it is further judged whether the segment already exists in the buffer, if it is discarded, otherwise it is judged whether there is an empty cache, if it is, the packet is stored, if not, i is compared with the maximum segment number MAX in the cache, and the smaller one is discarded and the larger one is discarded. . Access in accordance with the above rules will ensure that the "0" segment is completed (the "0" segment below refers to the beginning of the program), and the "1" segment (the next segment smoothly connected to the beginning segment) must be stored in And after the "0" segment is finished, then the "1" segment is played to make the program play continuously.
  • the segment number refers to the number given to each data packet by using a code stream table.
  • the arithmetic processor uses a reference clock to control the code stream transmission. First get two values PCR (i) field and PCR (i + l) field, and get M by the counter (the total number of frames between two adjacent PCR fields),
  • i represents the count value of the PCR field, the initial value is 0;
  • M the total number between two adjacent PCR fields
  • n represents the Nth frame data between two adjacent PCR fields, the initial value is 0, and the maximum value is M-1;
  • TS stream video transport stream
  • T indicates the difference in playback time between two adjacent PCR fields
  • TF indicates the length of time required to send each frame of data in PCR (i) and PCR (i + l);
  • P (i, n) indicates the time point of sending the n-th frame of data after the PCR (i) field;
  • T sys indicates the count value from the time when the first frame of data is sent.
  • the initial value is PCR (0). Comparison: When T sys ⁇ P (i, n), wait for data to be sent, and start to send the n-th frame of data when the times are equal;
  • TS stream is the data stream of the packet header
  • the packet header is removed via the data RAM
  • the first broadcast segment is quickly found using the memory allocation table.
  • the SDRAM controller and the SDRAM perform read-write control on the SDRAM, and the SDRAM serves as a buffer of the data stream, and the data taken out from the buffer is slowly played and written quickly to achieve on-demand effect.
  • the switch After booting, according to the channel selection status, it is determined whether the data to be sent is selected by the switch, flowed to the process controller, or directly sent to the STB motherboard for processing; if it is a video-on-demand signal, let its signal enter the V0D process controller. If not, the signal goes straight from the input to the STB browser board (motherboard).
  • Receiving data flow In the first-in-first-out (FIFO) state, the entire storage area is cleared, and the data is received from the video stream PID (packet information identifier) in the "0" segment. After the "0" segment is received, the "0" segment starts to play, other segments are received, and a data frame with a segment number CI is received. If the CI is smaller than the currently played segment number CS (meaning that it has been output), the segment will be played. Discard and receive the next one.
  • PID packet information identifier
  • CI is greater than the currently playing segment number CS, then judge whether the segment exists in the buffer, discard it, if not, otherwise judge whether there is an empty buffer, if yes, store the packet, and compare the CI and The maximum segment number CM size in the cache. Keep the smaller one and discard the larger one.
  • Process of sending data Change the PID number of the video stream, that is, restore the PID to its original state.
  • Judge CS 'segment is If it has already been sent, it will continue to play. If it is not completed, it will continue to play. If it is completed, it will continue to send CS + 1 data, and clear the buffer occupied by CS data.
  • the present invention uses a process controller and a sending controller to continuously receive and update the video stream, as long as the downlink signal is continuously received, the two-way on-demand function can be completed, eliminating a series of costs and operations such as the transmission and transmission of the uplink signal.
  • the two-way on-demand function can be completed, eliminating a series of costs and operations such as the transmission and transmission of the uplink signal.
  • due to the use of unidirectional video stream broadcasting there is no need to modify the existing network structure, which saves a lot of manpower and material resources for rebuilding the network, and the number of users is unlimited. It can be expanded with the expansion of the coverage of the wired network Quick and easy on-demand.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Human Computer Interaction (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

La présente invention concerne un microcircuit permettant l'obtention de vidéo à la demande instantané sur un réseau de télédistribution analogique à direction de conduite caractérisé en ce qu'il comporte: un commutateur de commande de canaux, une unité de commande de programmation, une unité de traitement de calculs, une mémoire vive dynamique synchrone et une unité de commande de celle-ci, une unité de commande de transmission de données de mémoire à accès direct (mémoire temporaire) et une interface entrée/sortie. Le commutateur de commande de canaux effectue la détection du signal vidéo et d'autres signaux et transmet le signal vidéo vers l'unité de commande de la programmation qui compare la taille du nombre de paquets, accède aux données de la mémoire à accès direct et envoie le signal par l'unité de contrôle en vue de l'archivage du résultat de vidéo à la demande. Ce microcircuit transforme le réseau en une structure simple, de fonctionnement aisé peu coûteux. FIG. 1 : 1 ENTREE 2 UNITE DE TRAITEMENT DE CALCUL 3 UNITE DE COMMANDE DE LA PROGRAMMATION 4 UNITE DE TRAITEMENT DE SIGNAL D'HORLOGE 5 UNITE DE REMISE A ZERO 6 UNITE D'AFFICHAGE DE CARACTERES 7 TERMINAL DE COMMANDE 8 COMMUTATEUR DE COMMANDE DE CANAUX 9 DONNEES 10 MEMOIRE A ACCES DIRECT (MEMOIRE TEMPORAIRE) 11 SIGNAL DE COMMANDE DE TRANSMISSION 12 UNITE DE COMMANDE DE MEMOIRE VIVE DYNAMIQUE SYNCHRONE 13 AUTRES SIGNAUX DE COMMANDE ET DE REQUETES 14 TABLE DE REPARTITION DE MEMOIRE INTERNE 15 SORTIE 16 INTERFACE DE SORTIE
PCT/CN2001/001161 2001-02-13 2001-07-09 Microcircuit permettant l'obtention de video a la demande instantane sur un reseau de teledistribution analogique a direction de conduite WO2002065770A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN01105324.0 2001-02-13
CNB011053240A CN1159913C (zh) 2001-02-13 2001-02-13 在有线电视单向网上实现视频随选点播的芯片

Publications (1)

Publication Number Publication Date
WO2002065770A1 true WO2002065770A1 (fr) 2002-08-22

Family

ID=4654406

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2001/001161 WO2002065770A1 (fr) 2001-02-13 2001-07-09 Microcircuit permettant l'obtention de video a la demande instantane sur un reseau de teledistribution analogique a direction de conduite

Country Status (2)

Country Link
CN (1) CN1159913C (fr)
WO (1) WO2002065770A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7924456B1 (en) * 2007-01-12 2011-04-12 Broadbus Technologies, Inc. Data distribution and buffering
CN103841448A (zh) * 2012-11-21 2014-06-04 海尔集团公司 机顶盒中间件装置、多媒体播放系统及播放方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000033565A2 (fr) * 1998-11-30 2000-06-08 Microsoft Corporation Procedes et systeme de video sur demande
WO2000067470A1 (fr) * 1999-05-04 2000-11-09 Unisys Corporation Systeme de video sur demande

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000033565A2 (fr) * 1998-11-30 2000-06-08 Microsoft Corporation Procedes et systeme de video sur demande
WO2000067470A1 (fr) * 1999-05-04 2000-11-09 Unisys Corporation Systeme de video sur demande

Also Published As

Publication number Publication date
CN1370008A (zh) 2002-09-18
CN1159913C (zh) 2004-07-28

Similar Documents

Publication Publication Date Title
JP4936751B2 (ja) 迅速なメディアチャネル切り替え機構、および該機構を含むアクセスネットワークノード
KR101064762B1 (ko) 고속 스타트업 프리젠테이션 방법, 컴퓨터 판독가능 기록매체, 컴퓨터, 및 컴퓨팅 디바이스
EP1389874B1 (fr) Changement rapide de canal numérique
CA2142801C (fr) Methode d'echantillonnage de trame pour systeme video a la demande
EP1285345A1 (fr) Systemes et procedes permettant de fournir des services video a la demande pour des systemes de diffusion
JP2013509768A (ja) デジタルオーディオ／ビデオチャンネル変更方法及び対応する装置
EP2545708A1 (fr) Procédé et système permettant d'inhiber un retard de synchronisation audio-vidéo
WO2013127611A1 (fr) Procédé de traitement vidéo et appareil vidéo mettant en œuvre le procédé
US20020026501A1 (en) Decreased idle time and constant bandwidth data-on-demand broadcast delivery matrices
CN101729755B (zh) 一种多媒体终端
JP5428734B2 (ja) ネットワーク機器、情報処理装置、ストリーム切替方法、情報処理方法、プログラムおよびコンテンツ配信システム
CN101662637A (zh) 一种播放一个传输码流中全部打包节目的方法及机顶盒
JP2003519987A (ja) ビデオ・オンデマンドを含むコンテンツのストリーミング能力を高める方法
CN1805503A (zh) 一种数字电视的点对多点无线网络互联的实现方法和装置
TW200421871A (en) Methods and apparatus for reducing tune-time delay in a television appliance with personal versatile recorder capabilities
WO2002065770A1 (fr) Microcircuit permettant l'obtention de video a la demande instantane sur un reseau de teledistribution analogique a direction de conduite
JP2013517715A (ja) マルチメディア放送番組の録画方法及び装置
CN108600826A (zh) 一种播放ts流的方法及装置
WO2007055445A1 (fr) Procede de previsualisation de plusieurs films ou filmets dans un appareil multimedia
WO2002076101A1 (fr) Systeme et procede sur demande permettant la selection aleatoire de video sur demande sur un reseau tv unidirectionnel cable
EP1340376A1 (fr) Matrices de distribution de diffusion de donnees sur demande a largeur de bande constante et a temps morts reduits
JP2002269910A (ja) ディスク記録再生装置及び方法、ディスク記録装置及び方法、並びに、ディスク記録再生装置及び方法
WO2002086673A2 (fr) Procedes et systemes d'emission de services sur demande de donnees generiques client a acces differe
TWI244869B (en) Data-on-demand digital broadcast system utilizing prefetch data transmission
KR100991845B1 (ko) Ｖｏｄ 시스템에서 컨텐츠의 정보파일과 ｇｏｐ 단위의 전송을 이용한 ｖｃｒ 유사 동작 처리방법

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CO CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP