KR960043916A - How to recover from data errors in video on demand systems - Google Patents

How to recover from data errors in video on demand systems Download PDF

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Publication number
KR960043916A
KR960043916A KR1019950013820A KR19950013820A KR960043916A KR 960043916 A KR960043916 A KR 960043916A KR 1019950013820 A KR1019950013820 A KR 1019950013820A KR 19950013820 A KR19950013820 A KR 19950013820A KR 960043916 A KR960043916 A KR 960043916A
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KR
South Korea
Prior art keywords
sync
signal
data
detected
error
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KR1019950013820A
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Korean (ko)
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KR0170963B1 (en
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최영도
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배순훈
대우전자 주식회사
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Priority to KR1019950013820A priority Critical patent/KR0170963B1/en
Publication of KR960043916A publication Critical patent/KR960043916A/en
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Publication of KR0170963B1 publication Critical patent/KR0170963B1/en

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    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Human Computer Interaction (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

본 발명은 주문형 비디오 시스템에서의 데이타 에러 복원 방법에 관한 것으로서, 이를 위하여, 주문형 비디오 시스템에서소정 비트의 동기 신호, ID 신호, 비디오 데이타 신호, 패리티 신호로 이루어진 다수의 동기 블럭을 포함하는 디지탈 데이타 스트림 재생시 상기 동기 블럭내의 동기 신호의 에러에 기인하여 발생되는 데이타 손실을 복원하기 위한 방법으로서, 입력되는 상기 디지탈 데이타 스트림에서 동기 신호를 검출 비교하여 동기 신호가 검출되면 입력되는 동기 블럭 데이타를 동기 블럭 단위로 재생 처리하는 제1과정과; 동기 신호가 검출되지 않으면 입력되는 동기 블럭 데이타를 메모리에 순차적으로 저장하고 다음 동기 블럭의 동기 신호가 검출되는지를 판단하는 제2과정과; 다음 동기 블럭의 동기 신호가 검출되면 동기 신호가 검출되지 않아서 메모리에 저장되어 있는 데이타의 에러를 복원하여 처리하는 제3과정을 포함하는 주문형 비디오 시스템에서의 데이타 에러 복원 방법을 제공함으로써, 재생시 디지탈 데이타 스트림내의 동기 블럭의 동기 신호 에러 발생시 동기 신호 에러를 복원하여 데이타 손실을 막을 수 있는 효과가 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data error recovery method in an on-demand video system. To this end, a digital data stream including a plurality of sync blocks consisting of a predetermined bit of a synchronization signal, an ID signal, a video data signal, and a parity signal in an on-demand video system. A method for recovering data loss caused by an error in a sync signal in the sync block during playback, wherein the sync block data is input when the sync signal is detected by comparing and comparing sync signals in the input digital data stream. A first process of reproducing in units; A second step of sequentially storing input sync block data in a memory if a sync signal is not detected and determining whether a sync signal of a next sync block is detected; By providing a data error recovery method in a video-on-demand system including a third process of recovering and processing an error of data stored in a memory when no synchronization signal is detected when a synchronization signal of a next sync block is detected. When a synchronization signal error of a synchronization block in a data stream occurs, the synchronization signal error can be restored to prevent data loss.

Description

주문형 비디오 시스템에서의 데이타 에러 복원 방법How to recover from data errors in video on demand systems

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 주문형 비디오 시스템에서의 데이타 포맷을 도시한 도면, 제2도는 본 발명에 따라 채용된 주문형 비디오 시스템에 대한 개략적인 블럭도, 제3도는 본 발명의 바람직한 실시예에 따른 주문형 비디오 시스템에서의 데이타 에러 복원 과정을 도시한 흐름도.1 shows a data format in an on-demand video system, FIG. 2 is a schematic block diagram of an on-demand video system employed in accordance with the present invention, and FIG. 3 is an on-demand video system in accordance with a preferred embodiment of the present invention. Flowchart illustrating the data error recovery process.

Claims (2)

주문형 비디오 시스템에서 소정 비트의 동기 신호, ID 신호, 비디오 데이타 신호, 패리티 신호로 이루어진다수의 동기 블럭을 포함하는 디지탈 데이타 스트림 재생시 상기 동기 블럭내의 동기 신호의 에러에 기인하여 발생되는 데이타 손실을 복원하기 위한 방법으로서, 입력되는 상기 디지탈 데이타 스트림에서 동기 신호를 검출 비교하여 동기 신호가 검출되면 입력되는 동기 블럭 데이타를 동기 블럭 단위로 재생 처리하는 제1과정과; 동기 신호가 검출되지 않으면입력되는 동기 블럭 데이타를 메모리에 순차적으로 저장하고 다음 동기 블럭의 동기 신호가 검출되는지를 판단하는 제2과정과; 다음 동기 블럭의 동기 신호가 검출되면 동기 신호가 검출되지 않아서 상기 메모리에 저장되어 있는 데이타의 에러를 복원하여 처리하는 제3과정을 포함하는 주문형 비디오 시스템에서의 데이타 에러 복원 방법.Restoring data loss caused by an error in the sync signal in the sync block when playing a digital data stream including a number of sync blocks comprising a predetermined number of sync signals, ID signals, video data signals, and parity signals in an on-demand video system. A method for performing the above-mentioned method, comprising: a first step of detecting and comparing a sync signal in an input digital data stream and reproducing the input sync block data in sync block units when a sync signal is detected; A second step of sequentially storing input sync block data in a memory if a sync signal is not detected and determining whether a sync signal of a next sync block is detected; And a third step of recovering and processing an error of data stored in the memory when the synchronization signal of the next sync block is not detected. 제1항에 있어서, 상기 제3과정은 상기 메모리에 저장되어 있는 데이타를 LIFO(Last In First Our) 방식으로 소정 비트까지 카운트하면서 스캐닝하여 ID 신호를 확인하는 과정과; ID 신호가 확인되면 ID 신호가 확인된 동기 블럭을 상기 메모리에서 출력하여 재생 처리하고 ID 신호가 확인이 안되면 상기 메모리를 클리어시키는 과정을 포함하는 것을특징으로 하는 주문형 비디오 시스템에서의 데이타 에러 복원 방법.The method of claim 1, wherein the third process comprises: checking an ID signal by scanning data stored in the memory by counting up to a predetermined bit in a LIFO (Last In First Our) method; And reproducing and processing the sync block in which the ID signal is confirmed when the ID signal is confirmed, and clearing the memory when the ID signal is not confirmed. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950013820A 1995-05-30 1995-05-30 Method for recovering data error in a video on demand system KR0170963B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950013820A KR0170963B1 (en) 1995-05-30 1995-05-30 Method for recovering data error in a video on demand system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950013820A KR0170963B1 (en) 1995-05-30 1995-05-30 Method for recovering data error in a video on demand system

Publications (2)

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KR960043916A true KR960043916A (en) 1996-12-23
KR0170963B1 KR0170963B1 (en) 1999-03-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100557107B1 (en) * 1998-12-30 2006-05-16 삼성전자주식회사 How to Recover Lost Packets of Data for On-Demand Video Services

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100557107B1 (en) * 1998-12-30 2006-05-16 삼성전자주식회사 How to Recover Lost Packets of Data for On-Demand Video Services

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KR0170963B1 (en) 1999-03-20

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