KR950004894A - Synchronization device between video signal and audio signal - Google Patents

Synchronization device between video signal and audio signal Download PDF

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KR950004894A
KR950004894A KR1019930013511A KR930013511A KR950004894A KR 950004894 A KR950004894 A KR 950004894A KR 1019930013511 A KR1019930013511 A KR 1019930013511A KR 930013511 A KR930013511 A KR 930013511A KR 950004894 A KR950004894 A KR 950004894A
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signal
data
data processing
time stamps
audio
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KR1019930013511A
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KR960008053B1 (en
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김근환
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배순훈
대우전자 주식회사
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing 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
    • H04N21/4302Content synchronisation processes, e.g. decoder synchronisation
    • H04N21/4305Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing 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
    • H04N21/434Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4341Demultiplexing of audio and video streams

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

Abstract

본 발명은 MPEG 권고안 범위내에서 표준안에 부합됨과 동시에 구체적으로 MPEG-영상신호와 MPEG-음성신호의 동기를 맞추기 위한 것으로, 멀티플렉스된 비트스트림의 데이타신호를 입력하여 신호처리수단을 통해 디멀티플렉싱한 다음 각각의 버퍼를 통해 영상디코더 및 음성디코더에 전달함으로써, 영상신호와 음성신호를 동기화시켜 디스플레이하는 영상신호와 음성신호간 동기화장치에 있어서, 신호처리수단은 멀티플렉스된 비트스트림의 데이타신호를 디멀티플렉스하고, 데이타신호에 포함된 시스템 타임클럭기준과 복수의 타임스탬프를 추출하는 데이타 처리장치와, 시스템 타임클럭과 복수의 타임스탬프에 의거하여 데이타 처리장치에 인터럽트신호를 발생함으로서 영산신호와 음성신호를 동기화시키는 수단으로 이루어진 것이다.The present invention conforms to the standard within the scope of MPEG recommendation and specifically to synchronize the MPEG video signal and the MPEG audio signal, and inputs the data signal of the multiplexed bitstream and demultiplexes it through signal processing means. Then, the video signal and the audio signal are synchronized with each other through the respective buffers, and then transmitted to the video decoder and the audio decoder. A data processing device which is multiplexed and extracts a system time clock criterion and a plurality of time stamps included in the data signal, and generates an interrupt signal to the data processing device based on the system time clock and the plurality of time stamps, thereby producing an audible signal and a voice. Means for synchronizing signals.

Description

영상신호와 음성신호간 동기화장치Synchronization device between video signal and audio signal

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제 1 도는 MPEG 영상, 음성신호의 처리시스템을 각각 보인 일반적인 블럭 구성도, 제 3 도는 본 발명의 일실시예에 따른 동기화장치의 블럭 구성도, 제 4 도는 본 발명의 다른 실시예에 따른 동기화장치의 블럭 구성도이다.1 is a general block diagram showing an MPEG video and audio signal processing system, FIG. 3 is a block diagram of a synchronization device according to an embodiment of the present invention, and FIG. Is a block diagram of.

Claims (8)

멀티플렉스된 비트스트림의 데이타신호를 입력하여 신호처리 수단을 통해 디멀티플렉싱한 다음 각각의 버퍼를 통해 영상디코더 및 음성디코더에 전달함으로써, 영상신호와 음성신호를 동기화시켜 디스플레이하는 영상신호와 음성신호간 동기화장치에 있어서, 상기 신호처리수단은 상기 멀티플렉스된 비트스트림의 데이타 신호를 디멀티플렉스하고, 데이타신호에 포함된 시스템 타임클럭기준과 복수의 타임스탬프를 추출하는 데이타 처리장치와; 상기 시스템 타임클럭과 복수의 타임스탬프에 의거하여 상기 데이타 처리장치에 인터럽트 신호를 발생함으로서 상기 영상신호와 음성신호를 동기화시키는 수단으로 이루어진 것을 특징으로 하는 영상신호와 음성신호간 동기화장치.Data signals of the multiplexed bitstreams are input, demultiplexed through signal processing means, and then transferred to the video decoder and the audio decoder through respective buffers, so that the video signal and the audio signal are synchronized and displayed. A synchronization device comprising: a data processing device for demultiplexing a data signal of the multiplexed bitstream and extracting a system time clock reference and a plurality of time stamps included in the data signal; And means for synchronizing the video signal and the audio signal by generating an interrupt signal to the data processing device based on the system time clock and the plurality of time stamps. 제 1 항에 있어서, 상기 데이타 처리장치는 상기 멀티플렉스된 비트스트림의 데이타신호를 디멀티플렉스하고, 이 데이타신호로부터 상기 시스템 타임클럭기준과 복수의 타임스탬프를 추출하는 CPU와, 이 복수의 타임스탬프를 저장하기 위한 메모리로 더욱 이루어진 것을 특징으로 하는 영상신호와 음성신호간 동기화장치.The data processing apparatus according to claim 1, wherein the data processing apparatus demultiplexes a data signal of the multiplexed bitstream and extracts the system time clock reference and a plurality of time stamps from the data signal, and the plurality of times. An apparatus for synchronizing between a video signal and an audio signal, further comprising a memory for storing a stamp. 제 2 항에 있어서, 상기 메모리는 상기 데이타 처리장치에서 추출한 복수의 타임스탬프로서 DTS-V,DTS-A,PTS-V 및 PTS-A의 4개의 값을 저장하는 영역을 포함하는 것을 특징으로 하는 영상신호와 음성신호간 동기화장치.3. The memory device of claim 2, wherein the memory includes an area for storing four values of DTS-V, DTS-A, PTS-V, and PTS-A as a plurality of time stamps extracted by the data processing apparatus. Synchronization device between video signal and audio signal. 제 1 항 내지 4항중 어느 한 항에 있어서, 상기 동기화수단은 상기 시스템 클럭을 입력으로 하여 기준시각을 제공하는 카운터와, 상기 복수의 타임스탬프를 입력으로 하는 레지스터수단과, 상기 카운터와 레지스터수단의 출력값을 비교한 다음 그에 상응하여 상기 데이타 처리장치에 동기화를 위한 인터럽트신호를 발생하는 비교수단으로 더욱 이루어진 것을 특징으로 하는 영상신호와 음성신호간 동기화장치.5. The apparatus according to any one of claims 1 to 4, wherein the synchronization means includes a counter for providing a reference time by inputting the system clock, a register means for inputting the plurality of time stamps, and the counter and register means. And a comparison means for comparing output values and correspondingly generating an interrupt signal for synchronization to the data processing device. 멀티플렉스된 비트스티림의 데이타신호를 입력하여 신호처리수단을 통해 디멀티플렉싱한 다음 각각의 버퍼를 통해 영상디코더 및 음성디코더에 전달함으로서, 영상신호와 음성신호를 동기화시켜 디스플레이하는 영상신호와 음성신호간 동기화장치에 있어서, 상기 신호처리수단은 상기 멀티플렉스된 비트스트림의 데이타 신호를 디멀티플렉스하고, 상기 데이타신호에 포함된 시스템 타임클럭기준과 복수의 타임스탬프를 추출하는 데이타 처리장치와; 상기 시스템 타임클럭과 복수의 타임스탬프에 의거하여 상기 영상디코더 및 음성디코더에 스트로브신호를 발생함으로서 상기 영상신호와 음성신호를 동기화시키는 수단으로 이루어진 것을 특징으로 하는 영상신호와 음성신호간 동기화장치.The data signal of the multiplexed bitstream is input, demultiplexed through signal processing means, and then transferred to the video decoder and the audio decoder through the respective buffers. An inter-synchronization apparatus, the signal processing means comprising: a data processing apparatus for demultiplexing a data signal of the multiplexed bitstream and extracting a system time clock reference and a plurality of time stamps included in the data signal; And a means for synchronizing the video signal and the audio signal by generating a strobe signal to the video decoder and the audio decoder based on the system time clock and the plurality of time stamps. 제 5 항에 있어서, 상기 데이타 처리장치는 상기 멀티플렉스된 비트스트림의 데이타신호를 디멀티플렉스하고, 이 데이타신호로부터 상기 시스템 타임클럭기준과 복수의 타임스탬프를 추출하는 CPU와, 이 복수의 타임스탬프를 저장하기 위한 메모리로 더욱 이루어진 것을 특징으로 하는 영상신호와 음성신호간 동기화장치.6. The data processing apparatus according to claim 5, wherein the data processing apparatus demultiplexes a data signal of the multiplexed bitstream, extracts the system time clock reference and a plurality of time stamps from the data signal, and the plurality of times. An apparatus for synchronizing between a video signal and an audio signal, further comprising a memory for storing a stamp. 제 6 항에 있어서, 상기 메모리는 상기 데이타 처리장치에서 추출한 복수의 타임스탬프로서 DTS-V, DTS-A, PTS-V 및 PTS-A의 4개의 값을 저장하는 영역을 포함하는 것을 특징으로 하는 영상신호와 음성신호간 동기화장치.7. The memory device of claim 6, wherein the memory includes an area for storing four values of DTS-V, DTS-A, PTS-V, and PTS-A as a plurality of time stamps extracted by the data processing apparatus. Synchronization device between video signal and audio signal. 제 5 항 내지 7항중 어느 한 항에 있어서, 상기 동기화수단은 상기 시스템 클럭을 입력으로 하여 기준 시각을 제공하는 카운터와, 상기 복수의 타임스탬프를 입력으로 하는 레지스터수단과, 상기 카운터와 레지스터수단의 출력값을 비교한 다음 그에 상응하여 상기 영상디코더 및 음성디코더에 동기화를 위한 스트로브신호를 발생하는 비교수단으로 더욱 이루어진 것을 특징으로 하는 영상신호와 음성신호간 동기화장치.8. The synchronization device according to any one of claims 5 to 7, wherein the synchronization means includes a counter for providing a reference time by inputting the system clock, a register means for inputting the plurality of time stamps, and the counter and register means. And a comparing means for comparing output values and generating a strobe signal for synchronizing with the video decoder and the audio decoder accordingly. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930013511A 1993-07-16 1993-07-16 Apparatus for synchronization of image signal and sound signal KR960008053B1 (en)

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