KR960028501A - Variable bit rate decoding device - Google Patents

Variable bit rate decoding device Download PDF

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Publication number
KR960028501A
KR960028501A KR1019940040654A KR19940040654A KR960028501A KR 960028501 A KR960028501 A KR 960028501A KR 1019940040654 A KR1019940040654 A KR 1019940040654A KR 19940040654 A KR19940040654 A KR 19940040654A KR 960028501 A KR960028501 A KR 960028501A
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South Korea
Prior art keywords
buffer
video
audio
bit stream
input buffer
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KR1019940040654A
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Korean (ko)
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KR100238261B1 (en
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강정석
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김광호
삼성전자 주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/146—Data rate or code amount at the encoder output
    • H04N19/152—Data rate or code amount at the encoder output by measuring the fullness of the transmission buffer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/30—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Communication Control (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

본 발명은 가변 비트율 복호화장치에 관한 것으로서, MPEG 시스템 계층 비트 스트림을 일시적으로 저장하는 입력버퍼와, 입력버퍼로 부터 출력되는 비트 스트림을 비디오 비트 스트림과 오디오 비트 스트림으로 구분하여 출력하는 시스템 계층 디코더와, 시스템 계층 디코더로 부터 출력되는 비디오 및 오디오 비트 스트림을 일시적으로 저장한 후 소정의 전송속도로 전송하는 비디오 버퍼 및 오디오 버퍼와, 비디오 버퍼 및 오디오 버퍼로 부터 출력되는 비트 스트림을 복호화하여 디지탈 비디오 및 오디오 신호로 각각 출력하는 오디오 디코더 및 비디오 디코더와, 입력버퍼의 상태 점검 및 전송단으로의 데이타 요구신호 발생, 비디오 버퍼 및 오디오 버퍼의 전송속도 결정 등의 기능을 행하는 버퍼제어부로 구성된다.The present invention relates to a variable bit rate decoding apparatus, comprising: an input buffer for temporarily storing an MPEG system layer bit stream, a system layer decoder for dividing and outputting a bit stream output from the input buffer into a video bit stream and an audio bit stream; The video buffer and audio buffer temporarily store the video and audio bit stream output from the system layer decoder and transmit the data stream at a predetermined transmission rate, and the digital video and the decoder decode the bit stream output from the video buffer and audio buffer. An audio decoder and a video decoder for outputting audio signals, respectively, and a buffer control unit for performing functions such as checking the status of the input buffer, generating a data request signal to the transmitting end, and determining transmission speeds of the video buffer and the audio buffer.

따라서, 주기적인 입력버퍼 점검과 비트율에 따른 전송률의 변경을 통하여 가변 비트율 복호화 시스템에서의 오버플로우 및 언더플로우 현상을 방지할 수 있어 안정적인 시스템 동작이 보장된다.Therefore, it is possible to prevent overflow and underflow in the variable bit rate decoding system by periodically checking the input buffer and changing the bit rate according to the bit rate, thereby ensuring stable system operation.

Description

가변 비트율 복호화장치Variable bit rate decoding device

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

제2도는 본 발명에 의한 가변 비트율 복호화장치의 구성을 나타낸 블럭도. 제3도는 제2도에 도시된 버퍼 제어부의 구성도. 제4도는 가변 비트율 복호화장치에 입력되는 ISO 11172 비트 스트림의 구성도.2 is a block diagram showing the configuration of a variable bit rate decoding apparatus according to the present invention. 3 is a configuration diagram of the buffer control unit shown in FIG. 4 is a configuration diagram of an ISO 11172 bit stream input to a variable bit rate decoding apparatus.

Claims (3)

MPEG 시스템 계층 비트 스트림을 일시적으로 저장하기 위한 입력버퍼; 상기 입력버퍼로 부터 출력되는 비트 스트림을 비디오 비트 스트림과 오디오 비트 스트림으로 구분하여 출력하기 위한 시스템 계층디코더; 상기 시스템 계층 디코더로 부터 출력되는 비디오 및 오디오 비트 스트림을 일시적으로 저장한 후 소정의 전송속도로 전송하는 비디오 버퍼및 오디오 버퍼; 상기 비디오 버퍼 및 오디오 버퍼로 부터 출력되는 비트 스트림을 복호화하여 디지탈 비디오 및 오디오 신호로 각각 출력하는 오디오 디코더 및 비디오 디코더; 및 상기 입력버퍼의 상태 점검 및 전송단으로의 데이타 요구신호 발생, 상기 비디오 버퍼 및 오디오 버퍼의 전송속도 결정 등의 기능을 행하는 버퍼제어부를 포함하는 것을 특징으로 하는 가변 비트율 복호화장치.An input buffer for temporarily storing the MPEG system layer bit stream; A system layer decoder for dividing the bit stream output from the input buffer into a video bit stream and an audio bit stream; A video buffer and an audio buffer for temporarily storing the video and audio bit streams output from the system layer decoder and transmitting them at a predetermined transmission rate; An audio decoder and a video decoder which decodes a bit stream output from the video buffer and the audio buffer and outputs the digital video and audio signals, respectively; And a buffer control unit for performing a function such as checking a state of the input buffer, generating a data request signal to a transmitting end, determining transmission speeds of the video buffer and the audio buffer, and the like. 제1항에 있어서, 상기 버퍼제어부는 상기 입력버퍼의 채워짐 상태를 점검하고, 점검결과에 따라서 전송단으로의 데이타 요구신호를 발생하는 입력버퍼 제어부; 상기 시스템 계층 디코더로 부터 출력되는 비디오 비트 스트림으로 부터 시퀸스 헤더를 검출한 후 비트율 정보를 추출하기 위한 비트율 검출부; 및 상기 비트율 검출부에서 출력된 비트율값을 사용하여 상기 비디오 버퍼의 전송클럭 주파수를 생성하기 위한 전송클럭 발생부로 구성되는 것을 특징으로 하는 가변 비트율 복호화장치.2. The apparatus of claim 1, wherein the buffer control unit comprises: an input buffer control unit for checking a state of filling of the input buffer and generating a data request signal to a transmission terminal according to a check result; A bit rate detecting unit for extracting bit rate information after detecting a sequence header from a video bit stream output from the system layer decoder; And a transmission clock generator for generating a transmission clock frequency of the video buffer by using the bit rate value output from the bit rate detection unit. 제2항에 있어서, 상기 입력버퍼 제어부는 상기 입력버퍼에 저장되어 있어 데이타량을 점검하여 현재의 데이타량이 하위 임계값이하로 되었을 경우는 데이타 요구신호를 저장매체로 전송하고, 현재의 데이타량이 상위 임계값 이상으로 저장되었을 경우는 데이타 요구신호를 해제하는 것을 특징으로 하는 가변 비트율 복호화장치.The method of claim 2, wherein the input buffer control unit is stored in the input buffer to check the amount of data, if the current data amount is less than the lower threshold value, and transmits a data request signal to the storage medium, the current data amount is higher And a data request signal is released when the data is stored above a threshold. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940040654A 1994-12-31 1994-12-31 Apparatus for decoding of variable bit rate KR100238261B1 (en)

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KR100238261B1 KR100238261B1 (en) 2000-01-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100490403B1 (en) * 2002-05-04 2005-05-17 삼성전자주식회사 Method for controlling buffering of audio stream and apparatus thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101390192B1 (en) 2008-01-17 2014-04-29 삼성전자주식회사 Transmission apparatus and receiving apparatus of video trasmission system, and buffer control method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960008470B1 (en) * 1994-01-18 1996-06-26 Daewoo Electronics Co Ltd Apparatus for transferring bit stream data adaptively in the moving picture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100490403B1 (en) * 2002-05-04 2005-05-17 삼성전자주식회사 Method for controlling buffering of audio stream and apparatus thereof

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