KR970057862A - Satellite channel HDTV system compatible with terrestrial channel HDTV broadcasting - Google Patents

Satellite channel HDTV system compatible with terrestrial channel HDTV broadcasting Download PDF

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KR970057862A
KR970057862A KR1019950067247A KR19950067247A KR970057862A KR 970057862 A KR970057862 A KR 970057862A KR 1019950067247 A KR1019950067247 A KR 1019950067247A KR 19950067247 A KR19950067247 A KR 19950067247A KR 970057862 A KR970057862 A KR 970057862A
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image
encoder
decoder
terrestrial
video data
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KR1019950067247A
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Korean (ko)
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KR0179104B1 (en
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박희복
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구자홍
Lg 전자 주식회사
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/015High-definition television systems
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03MCODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3002Conversion to or from differential modulation
    • H03M7/3044Conversion to or from differential modulation with several bits only, i.e. the difference between successive samples being coded by more than one bit, e.g. differential pulse code modulation [DPCM]
    • H03M7/3046Conversion to or from differential modulation with several bits only, i.e. the difference between successive samples being coded by more than one bit, e.g. differential pulse code modulation [DPCM] adaptive, e.g. adaptive differential pulse code modulation [ADPCM]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04HBROADCAST COMMUNICATION
    • H04H20/00Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/44Arrangements characterised by circuits or components specially adapted for broadcast
    • H04H20/46Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95
    • H04H20/51Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for satellite broadcast systems
    • 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
    • H04N19/102Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/124Quantisation
    • 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
    • H04N19/102Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/13Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/625Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using discrete cosine transform [DCT]

Abstract

본 발명은 위성채널 HDTV 방송 시스템이 지상채널 방송 시스템과 양립성을 가지면서 원하는 화질을 얻을 수 있도록 하는 지상 채널 HDTV 방송과 양립하는 위성 채널 HDTV 시스템과 관한 것으로, 특히 위성 채널 대역중 지상채널 전송과 동일한 데이타를 보낼 수 있는 대역을 빼고 남는 대역을 이용하여 위성채널 전송시만의 화질 개선을 위한 데이타를 전송함으로써, 위성채널과 지상채널의 HDTV 시스템이 서로 양립하면서도 위성채널의 주파수 대역의 낭비를 초래하지 않고 동시에 원하는 화질을 얻을 수 있다. 또한, 전송의 부호화 및 복호화는 채널이 다르기 때문에 다르게 구성하지만 비데오/오디오 부호화 및 복호화는 지상방송이나 위성방송이나 상관없이 사용할 수 있기 때문에 비데오 부호화 및 복호화에서 양립할 수 있는 것은 부호화에 드는 시간적 손실을 줄일 수 있고, 비트 스트림만 저장하거나 이동해도 되므로 대용량의 원화상을 저장하는데 드는 비용을 절감할 수 있게 된다.The present invention relates to a satellite channel HDTV system that is compatible with a terrestrial channel HDTV broadcasting system in which a satellite channel HDTV broadcasting system is compatible with a terrestrial channel broadcasting system and obtains a desired picture quality. By subtracting the band where data can be sent and transmitting the data to improve the image quality only when the satellite channel is transmitted, the satellite and terrestrial HDTV systems are compatible with each other and do not cause waste of the frequency band of the satellite channel. At the same time, the desired image quality can be obtained. In addition, since encoding and decoding of transmission are configured differently because the channels are different, video / audio encoding and decoding can be used regardless of terrestrial broadcasting or satellite broadcasting, so that the compatibility between video encoding and decoding can reduce the time loss of encoding. This can reduce the cost of storing a large original image because only a bit stream can be stored or moved.

Description

지상채널 에이치디티브이(HDTV) 방송과 양립하는 위성채널 에이치디티브이(HDTV)시스템Satellite channel HDTV system compatible with terrestrial channel HDTV broadcasting

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

제3도는 본 발명에 따른 지상 채널 HDTV 방송과 양립하는 위성 채널 HDTV 시스템의 부호화 장치의 일실시예를 나타낸 블럭도.3 is a block diagram showing an embodiment of an encoding apparatus of a satellite channel HDTV system compatible with terrestrial channel HDTV broadcasting according to the present invention.

Claims (9)

원래의 화상을 엠펙2(MPEG2) 부호화 알고리즘을 이용하여 지상채널 비데오 데이타 비트율로 부호화하여 주 비트 스트림으로 전송하는 제1부호화기와, 상기 제1부호화기에서 부호화된 화상을 엠펙2 복호화 알고리즘을 이용하여 복호화하는 복호화기와, 원 화상과 상기 복호화기에서 복호된 화상과의 차이를 추출하여 차이 화상을 생성하는 차이화상 생성수단과, 상기 차이화상 생성수단에서 출력되는 차이 화상을 위성채널 비데오 데이타 비트율에서 지상채널 비데오 데이타 비트율을 뺀 비트율로 부호화하여 추가 비트 스트림으로 전송하는 제2부호화기로 구성되는 지상 채널 HDTV 방송과 양립하는 위성 채널 HDTV 시스템의 부호화기.A first encoder which encodes the original image using the MPEG2 encoding algorithm at the terrestrial channel video data bit rate and transmits it to the main bit stream, and decodes the image encoded by the first encoder using the MPEG2 decoding algorithm. A difference image generating means for generating a difference image by extracting a difference between the original image and the image decoded by the decoder, and a difference image output from the difference image generating means at a satellite channel video data bit rate. Encoder of a satellite channel HDTV system compatible with terrestrial channel HDTV broadcasting comprising a second encoder that encodes at a bit rate minus a video data bit rate and transmits the additional bit stream. 제1항에 있어서, 상기 제1부호화기는 현재의 입력 신호와 이전의 신호에 의한 예측 신호간의 차이를 양자화하여 변조 및 존송하는 차분 펄스코드 변조(DPCM) 방식으로 차이 화상을 부호화함을 특징으로 하는 지상 채널 HDTV 방송과 양립하는 위성 채널 HDTV 시스템의 부호화기.The method of claim 1, wherein the first encoder encodes the difference picture by a differential pulse code modulation (DPCM) method in which the difference between the current input signal and the prediction signal by the previous signal is quantized, modulated, and transmitted. Encoder for satellite channel HDTV systems compatible with terrestrial channel HDTV broadcasting. 제1항에 있어서, 상기 제2부호화기는 차분펄스 코드변조(DPCM)에서 입력되는 신호의 특성에 따라 예측 변수들을 조정하여 오차신호의 분산을 최소화하면서 양자화하는 적응차분펄스 코드변조(ADPCM) 방식으로 차이 화상을 부호화함을 특징으로 하는 지상채널 HDTV 방송과 양립하는 위성 채널 HDTV 시스템의 부호화기.The method of claim 1, wherein the second encoder is an adaptive differential pulse code modulation (ADPCM) method of quantizing while minimizing dispersion of error signals by adjusting predictive variables according to characteristics of a signal input from differential pulse code modulation (DPCM). An encoder in a satellite channel HDTV system compatible with terrestrial channel HDTV broadcasting, characterized by encoding a difference picture. 제1항에 있어서, 상기 제2부호화기는 이산여현변환(DCT), 양자화, 및 가변길이코딩(VLC) 과정을 순차적으로 수행하여 차이 화상을 부호화함을 특징으로 하는 지상 채널 HDTV 방송과 양립하는 위성 채널 HDTV 시스템의 부호화기.The satellite of claim 1, wherein the second encoder encodes a difference image by sequentially performing a discrete cosine transform (DCT), quantization, and variable length coding (VLC) process. Encoder for channel HDTV systems. 위성채널 비데오 데이타 비트율로 전송되는 주 비트 스트림을 엠펙 2 복호화 알고리즘을 이용하여 복호하는 제1복호화기와, 위성채널 비데오 데이타 비트율에서 지상채널 비데오 데이타 비트율을 뺀 비트율로 전송되는 추가 비트 스트림을 특수 복호화하는 제2복호화기와, 상기 제1복호화기에서 복호된 화상과 제2복호화기에서 복호된 화상을 더하여 원래의 화상으로 복원하는 원 화상 복원수단으로 구성되는 지상 채널 HDTV 방송과 양립하는 위성 채널 HDTV 시스템의 복호화기.A first decoder which decodes the main bit stream transmitted at the satellite channel video data rate using the MPEG 2 decoding algorithm, and specially decodes an additional bit stream transmitted at the bit rate obtained by subtracting the terrestrial video data bit rate from the satellite channel video data bit rate. A satellite channel HDTV system compatible with terrestrial channel HDTV broadcasting comprising a second decoder and an original image restoration means for adding an image decoded by the first decoder and an image decoded by the second decoder to restore an original image. Decryptor. 제5항에 있어서, 상기 제2복호화기는 가변길이디코딩(VLD), 역양자화, 역이산여현변환(IDCT) 과정을 순차적으로 수행하여 전송되는 추가 비트 스트림을 복호화함을 특징으로 하는 지상 채널 HDTV 방송과 양립하는 위성 채널 HDTV 시스템의 복호화기.6. The terrestrial channel HDTV broadcasting according to claim 5, wherein the second decoder decodes an additional bit stream transmitted by sequentially performing variable length decoding (VLD), inverse quantization, and inverse discrete cosine transform (IDCT). Decoder of satellite channel HDTV system compatible with. 원래의 화상을 엠펙 2 부호화 알고리즘을 이용하여 지상채널 비데오 데이타 비트율로 부호화하여 주 비트 스트림으로 전송하는 제1부호화기와, 상기 제1부호화기에서 이산여현변환된 화상과 역이산여현변환된 화상과의 차이를 추출하여 양자화에 의해 손실된 부분을 보상하기 위한 차이 화상을 생성하고 생성된 차이 화상을 위성채널 비데오 데이타 비트율에서 지상채널 비데오 데이타 비트율을 뺀 비트율로 부호화하여 추가 비트 스트림으로 전송하는 제2부호화기로 구성되는 지상 채널 HDTV 방송과 양립하는 위성 채널 HDTV 시스템의 부호화기.Difference between a first coder that encodes an original picture at a terrestrial channel video data bit rate using an MPEG 2 encoding algorithm and transmits it to a main bit stream, and a difference between a discrete cosine transformed image and an inverse discrete cosine transformed image in the first encoder To generate a difference image to compensate for the part lost by quantization, and encode the generated difference image at a bit rate obtained by subtracting the ground channel video data bit rate from the satellite channel video data rate and transmitting the resultant image as an additional bit stream. Encoder of satellite channel HDTV system compatible with terrestrial channel HDTV broadcasting. 상기 7항에 있어서, 상기 제2부호화기는 양자화 및 가변길이 코딩(VLC) 과정을 거쳐 차이 화상을 부호화함을 특징으로 하는 지상 채널 HDTV 방송과 양립하는 위성 채널 HDTV 시스템의 부호화기.8. The encoder of claim 7, wherein the second encoder encodes the difference image through quantization and variable length coding (VLC). 위성채널 비데오 데이타 비트율로 전송되는 주 비트 스트림을 가변길이디코딩(VLD) 및 역양자화 과정을 거쳐 복원하는 제1복호화기와, 위성채널 비데오 데이타 비트율에서 지상채널 비데오 데이타 비트율을 뺀 비트율로 전송되는 추가 비트 스트림을 가변길이디코딩(VLD) 및 역양자화 과정을 거쳐 복원하는 제2복호화기와, 상기 제1복호화기에서 역양자화된 화상과 제2복호화기에서 역양자화된 화상을 더하는 화상 복원수단으로 구성되고, 상기 제1복호화기는 상기 화상복원 수단에서 출력되는 화상에 역이산여현변환을 수행한 후 움직임 보상된 화상을 더하여 최초의 원 화상으로 복원함을 특징으로 하는 지상 채널 HDTV 방송과 양립하는 위성 채널 HDTV 시스템의 복호화기.A first decoder for restoring the main bit stream transmitted at the satellite channel video data rate through variable length decoding (VLD) and dequantization, and an additional bit transmitted at the bit rate obtained by subtracting the terrestrial video data rate from the satellite channel video data rate. A second decoder for restoring the stream through a variable length decoding (VLD) and inverse quantization process, and image restoring means for adding a dequantized picture in the first decoder and a dequantized picture in the second decoder, The first decoder is a satellite channel HDTV system compatible with terrestrial channel HDTV broadcasting, characterized in that to perform an inverse discrete cosine transform to the image output from the image restoring means and to add a motion compensated image to restore the original original image. Decoder. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950067247A 1995-12-29 1995-12-29 Satellite channel hdtv incompatible with ground channel hdtv broadcasting KR0179104B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100738930B1 (en) * 2006-01-06 2007-07-12 에스케이 텔레콤주식회사 Method and system for improving video quality of satellite digital multimedia broadcasting by using multiple transmission by mobile communication network and satellite digital multimedia broadcasting network and apparatus therefor

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US5761605A (en) * 1996-10-11 1998-06-02 Northpoint Technology, Ltd. Apparatus and method for reusing satellite broadcast spectrum for terrestrially broadcast signals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100738930B1 (en) * 2006-01-06 2007-07-12 에스케이 텔레콤주식회사 Method and system for improving video quality of satellite digital multimedia broadcasting by using multiple transmission by mobile communication network and satellite digital multimedia broadcasting network and apparatus therefor

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