KR970014341A - Variable length decoder for video data recorded according to sequential recording method - Google Patents

Variable length decoder for video data recorded according to sequential recording method Download PDF

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KR970014341A
KR970014341A KR1019950024259A KR19950024259A KR970014341A KR 970014341 A KR970014341 A KR 970014341A KR 1019950024259 A KR1019950024259 A KR 1019950024259A KR 19950024259 A KR19950024259 A KR 19950024259A KR 970014341 A KR970014341 A KR 970014341A
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data
segment
variable length
decoding
fixed
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KR1019950024259A
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Korean (ko)
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KR100219131B1 (en
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홍민석
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김광호
삼성전자 주식회사
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/42Methods 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
    • H04N19/423Methods 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 characterised by memory arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/17Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
    • H04N19/176Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/90Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
    • H04N19/91Entropy coding, e.g. variable length coding [VLC] or arithmetic coding

Abstract

본 발명은 순차 기록방식의 기록매체에 세그먼트단위로 비트량을 고정하여 기록된 가변장 부호화된 데이타를 복호하는 가변장 복호기에 관한 것이다. 본 발명은 가변장 복호기는 가변장 부호화된 데이타를 세그먼트단위로 저장하는 세그먼트메모리와, 세그먼트메모리에 저장된 데이타를 워드단위로 읽어내기 위한 어드레스를 발생하는 어드레스 발생부와, 각 블럭의 고정된 데이타가 끝나는 위치를 저장하고 있는 세그먼트 포인터 메모리와, 블록단위로 고정한 고정된 데이타와 매크로블록단위로 고정한 매크로블록리메인더와 비데오 세그먼트 단위로 고정한 비데오세그먼트리메인더부분의 데이타 순으로 복호가 이루어질 수 있도록 어드레스 발생부를 제어하는 제어부, 및 매크로 블록 리매인더부분의 데이타의 가변장 복호 시작위치를 제어하는 부호어길이누적제어부로 이루어지느 복호제어수단과, 세그먼트메모리에서 공급되는 데이타를 가변장 복호하는 가변장 복호수단으로 구성된다. 따라서, 본 발명은 디지탈 VCR등에서 제시한 기록규격에 따라 기록된 부호화된 데이타를 복호할 수 있다.The present invention relates to a variable length decoder for decoding variable length coded data recorded by fixing a bit amount on a segment basis in a recording medium of a sequential recording method. According to the present invention, a variable length decoder includes a segment memory for storing variable length encoded data in segment units, an address generator for generating an address for reading data stored in the segment memory in word units, and fixed data of each block. Segment pointer memory storing the end position, fixed data fixed in units of blocks, macroblock reminders fixed in units of macroblocks, and data of video segment reminder units fixed in units of video segments. Decoding control means comprising a control unit for controlling the address generation unit, a codeword length accumulation control unit for controlling the variable length decoding start position of the data in the macroblock reminder portion, and a variable length decoding variable data supplied from the segment memory. It consists of chapter decoding means. Therefore, the present invention can decode encoded data recorded according to a recording standard suggested by a digital VCR or the like.

Description

순차기록방식에 따라 기록된 영상데이타를 위한 가변장 복호기Variable length decoder for video data recorded according to sequential recording method

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

제1도는 가변장부호화된 데이타를 복호화하기 위한 종래의 가변장 복호기.1 is a conventional variable length decoder for decoding variable length coded data.

제3도는 본 발명의 바람직한 실시예에 따른 순차기록방식에 따라 기록된 영상데이타를 위한 가변장 복호기를 나타내는 구성도.3 is a block diagram showing a variable length decoder for image data recorded according to a sequential recording method according to a preferred embodiment of the present invention.

Claims (5)

고정된 비트량의 블록들로 이루어진 매크로블록 다수개로 된 세그먼트단위의 가변장 부호화된 데이타를 복호화하는 가변장 복호기에 있어서, 공급되는 부호화된 데이타를 가변장 복호화하여 복호화된 데이타를 출력하는 가변장 복호수단; 및 상기 가변장 복호수단에서 복호할 데이타를 정해진 순서에 따라 공급하며, 복호시작위치를 조정하는 복호제어수단을 포함하는 순차기록방식에 따라 기록된 영상데이타를 위한 가변장 복호기.In a variable length decoder for decoding variable-length coded data in segment units of a plurality of macroblocks having a fixed number of blocks, variable-length decoding for variable-length decoding the supplied coded data and outputting the decoded data. Way; And decoding control means for supplying data to be decoded by the variable length decoding means in a predetermined order, and adjusting decoding start position. 10. A variable length decoder for image data recorded according to a sequential recording method. 제1항에 있어서, 상기 복호제어수단은 세그먼트단위로 가변장 부호화된 데이타를 저장하는 세그먼트메모리; 제어부에서 요구하는 데이타들을 상기 세그먼트메모리로부터 읽어내기 위한 어드레스를 발생하기 위한 어드레스 발생부; 각 블록의 끝(EOB)을 나타내는 부호의 상기 세그먼트메모리상이 위치를 저장하는 세그먼트 포인터 메모리; 상기 가변장 복호수단에서 누적된 부호어길이 및 1클럭 래칭된 이전 부호어길이와, 블록의 끝(EOB)을 나타내는 신호, 상기 세그먼트 포인터 메모리로부터 읽어들인 위치정보를 입력받고, 상기 어드레스 발생부에 해당하는 매크로블록위치, 블록위치, 워드위치의 데이타를 요구하며, 부호어길이누적제어부로 해당하는 비트위치정보를 공급하는 제어부; 및 상기 제어부로부터 공급되는 비트위치정보에 따라 상기 가변장 복호수단의 누적된 부호어길이 및 1클럭 래칭된 이전 부호어길이를 설정하여 복호시작위치를 조정하는 부호어길이누적제어부를 구비함을 특징으로 하는 순차 기록방식에 따라 기록된 영상데이타를 위한 가변장 복호기.2. The apparatus of claim 1, wherein the decoding control means comprises: a segment memory for storing variable length coded data in units of segments; An address generator for generating an address for reading data requested by the controller from the segment memory; A segment pointer memory for storing a position on said segment memory of a sign indicating the end of each block EOB; A codeword length accumulated by the variable length decoding means, a previous codeword length latched by one clock, a signal indicating the end of the block (EOB), and position information read from the segment pointer memory are inputted, and the address generator A controller for requesting data of a corresponding macroblock position, a block position, a word position, and supplying corresponding bit position information to a codeword length accumulation control unit; And a codeword length accumulation control unit for adjusting the decoding start position by setting the accumulated codeword length of the variable length decoding means and the previous codeword length latched by one clock according to the bit position information supplied from the controller. A variable length decoder for image data recorded according to a sequential recording method. 제2항에 있어서, 상기 세그먼트메모리는 4개의 휘도신호 블록과 2개의 색차신호 블록으로 된 매크로블록 5개를 세그먼트단위로 하여 가변장부호화된 데이타가 저장되며, 각 블록의 데이타를 부호화하여 고정된 비트량을 초과하는 데이타들은 다른 블록의 빈영역에 기록되고, 고정된 비트량을 초과하지 않으면 그 부호화된 데이타의 끝에 블럭의 끝(EOB)을 나타내는 신호가 기록되는 형태로 나타나는 것을 특징으로 하는 순차기록방식에 따라 기록된 영상데이타를 위한 가변장 복호기.3. The segment memory according to claim 2, wherein the segment memory stores variable length coded data by segmenting five macroblocks consisting of four luminance signal blocks and two color difference signal blocks in segments. The data exceeding the bit amount is recorded in a free area of another block, and if the fixed bit amount is not exceeded, a signal indicating the end of the block (EOB) is recorded at the end of the encoded data. Variable length decoder for recorded image data according to recording method. 제3항에 있어서, 상기 세그먼트메모리에 저장된 데이타의 형태는 블록단위로 고정한 고정된 데이타와, 블록의 정해진 비트량을 초과하여 다른 블록의 빈영역에 기록된 매크로블록단위로 고정한 매크로블록 리매인터, 및 매크로블록의 정해진 비트량을 초과하여 다른 매크로블록의 빈영역에 기록된 비데오 세그먼트단위로 고정한 비데오 세그먼트 리매인더로 나타나는 것을 특징으로 하느 순차기록방식에 따라 기록된 영상데이타를 위한 가변장 복호기.4. The method of claim 3, wherein the type of data stored in the segment memory includes fixed data fixed in units of blocks, macroblock refixers fixed in units of macroblocks recorded in free areas of other blocks in excess of a predetermined bit amount of blocks; And a video segment reminder fixed by video segment units recorded in a free area of another macro block in excess of a predetermined bit amount of a macro block, wherein the variable length decoder for image data recorded according to a sequential recording method. 제4항에 있어서, 상기 제어부는 상기 세그먼트메모리에 저장된 데이타들이 고정된 데이타와, 매크로블록 리매인더, 및 비데오 세그먼트 리매인더 순으로 가변장 복호될 수 있도록 차례로 매크로블록위치, 블록위치, 워드위치를 상기 어드레스 발생부에 지정하고, 상기 가변장 복호수단에서 복호화된 데이타가 블록의 끝(EOB)을 나타내는 신호이면 그때의 매크로블록위치, 블록위치, 워드위치, 비트위치를 상기 어드레스 발생부를 통해 상기 세그먼트 포인터 메모리에 저장시키고, 고정된 데이타에 대한 복호가 완료되면 세그먼트 포인터 메모리에 저장된 위치정보를 이용하여 매크로블록 리매인더 및 비데오 세그먼트 리매인더부분의 데이타에 대한 복호가 이루어질 수 있도록 하는 것을 특징으로 하는 순차기록방식에 따라 기록된 영상데이타를 위한 가변장 복호기.The method of claim 4, wherein the controller sequentially controls the macroblock position, the block position, and the word so that the data stored in the segment memory can be variably decoded in the order of fixed data, macroblock reminder, and video segment reminder. If the position is assigned to the address generator, and the data decoded by the variable length decoding means is a signal indicating the end of the block (EOB), then the macroblock position, block position, word position, and bit position at that time are transmitted through the address generator. Storing in the segment pointer memory, and when decoding of the fixed data is completed, decoding of the data of the macroblock reminder and the video segment reminder part may be performed using the location information stored in the segment pointer memory. For video data recorded according to a sequential recording method characterized by Disguise decoder. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950024259A 1995-08-05 1995-08-05 Variable length decoder for image data recoded according to sequential access method KR100219131B1 (en)

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