KR100511693B1 - 화상 복호화 장치 - Google Patents
화상 복호화 장치 Download PDFInfo
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- KR100511693B1 KR100511693B1 KR10-2004-7017024A KR20047017024A KR100511693B1 KR 100511693 B1 KR100511693 B1 KR 100511693B1 KR 20047017024 A KR20047017024 A KR 20047017024A KR 100511693 B1 KR100511693 B1 KR 100511693B1
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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
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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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods 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
- H04N19/12—Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
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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
- H04N19/20—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video object coding
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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
- H04N19/40—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
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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
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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
- H04N19/44—Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
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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
- H04N19/46—Embedding additional information in the video signal during the compression process
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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
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
- H04N19/51—Motion estimation or motion compensation
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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
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
- H04N19/51—Motion estimation or motion compensation
- H04N19/513—Processing of motion vectors
- H04N19/517—Processing of motion vectors by encoding
-
- 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
- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
- H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/24—Systems for the transmission of television signals using pulse code modulation
- H04N7/52—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal
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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
- H04N19/70—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Discrete Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Compression Of Band Width Or Redundancy In Fax (AREA)
Abstract
Description
Claims (4)
- 적어도 H.263 부호화 방식의 헤더 정보와 H.263 부호화 방식으로 부호화된 화상 부호화 데이터가 다중화된 제 1 부호화 비트 스트림, 또는 MPEG-4 부호화 방식의 헤더 정보와 MPEG-4 부호화 방식으로 부호화된 화상 부호화 데이터가 다중화된 제 2 부호화 비트 스트림을 복호하는 화상 복호화 장치에 있어서,상기 제 1 부호화 비트 스트림을 수신한 경우와, 상기 제 2 부호화 비트 스트림을 수신한 경우에서, 인트라 부호화된 DCT 계수의 직류 성분의 복호 해석 방법을 바꾸는 전환 수단을 구비하고,상기 전환 수단은, 상기 제 1 부호화 비트 스트림을 수신한 경우에 미리 정해진 고정 부호 길이로 인트라 DCT 계수의 직류 성분을 복호하는 것을 특징으로 하는, 화상 복호화 장치.
- 적어도 H.263 부호화 방식의 헤더 정보와 H.263 부호화 방식으로 부호화된 화상 부호화 데이터가 다중화된 제 1 부호화 비트 스트림, 또는 MPEG-4 부호화 방식의 헤더 정보와 MPEG-4 부호화 방식으로 부호화된 화상 부호화 데이터가 다중화된 제 2 부호화 비트 스트림을 복호하는 화상 복호화 장치에 있어서,상기 제 1 부호화 비트 스트림을 수신한 경우와, 상기 제 2 부호화 비트 스트림을 수신한 경우에서, DCT 계수의 교류성분의 복호 해석 방법을 바꾸는 전환 수단과, DCT 계수의 교류 성분의 복호에 사용하는 2종류의 가변 길이 부호 테이블을 구비하고,상기 전환 수단은, 상기 제 1 부호화 비트 스트림을 수신한 경우에는, DCT 블록이 속하는 매크로 블록의 부호화 타입에 근거하지 않고, 항상 상기 2종류의 가변길이 부호 테이블 중의 한쪽을 사용하여 DCT 계수의 교류성분을 복호하고,상기 제 2 부호화 비트 스트림을 수신한 경우에는, 상기 2종류의 가변길이 부호테이블 중, DCT 블록이 속하는 매크로 블록의 부호화 타입에 따라서 선택되는 가변길이 부호 테이블을 사용하여 DCT 계수의 교류성분을 복호하는 것을 특징으로 하는, 화상 복호화 장치.
- 적어도 H.263 부호화 방식의 헤더 정보와 H.263 부호화 방식으로 부호화된 화상 부호화 데이터가 다중화된 제 1 부호화 비트 스트림, 또는 MPEG-4 부호화 방식의 헤더 정보와 MPEG-4 부호화 방식으로 부호화된 화상 부호화 데이터가 다중화된 제 2 부호화 비트 스트림을 복호하는 화상 복호화 장치에 있어서,상기 제 1 부호화 비트 스트림을 수신한 경우와, 상기 제 2 부호화 비트 스트림을 수신한 경우에서, DCT 계수의 이스케이프 코드 해석 방법을 바꾸는 전환 수단을 구비하고,상기 전환수단은 상기 제 1 부호화 비트 스트림을 수신한 경우에, DCT 계수복호의 과정에서 이스케이프 코드를 검출한 경우는 그것에 계속되는 DCT 계수 부호화 데이터를 고정 길이로 복호 해석하고, 상기 제 2 부호화 비트 스트림을 수신한 경우에는, DCT 계수 복호의 과정에서 이스케이프 코드를 검출한 경우는 그것에 계속되는 부호를 보정함으로써 DCT 계수 부호화 데이터 복호를 가능하게 하는 것을 특징으로 하는, 화상 복호화 장치.
- 적어도 H.263 부호화 방식의 헤더 정보와 H.263 부호화 방식으로 부호화된 화상 부호화 데이터가 다중화된 제 1 부호화 비트 스트림, 또는 MPEG-4 부호화 방식의 헤더 정보와 MPEG-4 부호화 방식으로 부호화된 화상 부호화 데이터가 다중화된 제 2 부호화 비트 스트림을 복호하는 화상 복호화 장치에 있어서,상기 제 1 부호화 비트 스트림을 수신한 경우와, 상기 제 2 부호화 비트 스트림을 수신한 경우에서, 인트라 DCT 계수의 교류성분의 예측 처리가 있는지의 여부를 나타내는 AC 예측 유무 지시 정보의 복호 해석 방법을 바꾸는 전환 수단을 구비하고,상기 전환 수단은, 상기 제 1 부호화 비트 스트림을 수신한 경우에는, 매크로 블록 부호화 데이터 복호 해석의 과정에서 AC 예측 유무 지시 정보의 복호 해석을 스킵함과 동시에 AC 예측 없음이라고 판단하고,상기 제 2 부호화 비트 스트림을 수신한 경우에는, AC 예측 유무 지시 정보의 복호 해석을 하고, 그 복호치에 근거하여 AC 예측의 유무를 정하는 것을 특징으로 하는, 화상 복호화 장치.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP1997/003846 WO1999022524A1 (en) | 1997-10-23 | 1997-10-23 | Image decoder, image encoder, image communication system, and encoded bit stream converter |
Related Parent Applications (1)
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KR10-2004-7008424A Division KR100487989B1 (ko) | 1997-10-23 | 1997-10-23 | 화상 복호화 장치 및 화상 부호화 장치 |
Publications (2)
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KR20040099465A KR20040099465A (ko) | 2004-11-26 |
KR100511693B1 true KR100511693B1 (ko) | 2005-09-02 |
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ID=14181361
Family Applications (7)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR10-2004-7005173A KR100487988B1 (ko) | 1997-10-23 | 1997-10-23 | 부호화 비트 스트림 변환 장치 |
KR1020007004314A KR20010031320A (ko) | 1997-10-23 | 1997-10-23 | 화상 복호화 장치, 화상 부호화 장치, 화상 통신 시스템및 부호화 비트 스트림 변환장치 |
KR10-2004-7008424A KR100487989B1 (ko) | 1997-10-23 | 1997-10-23 | 화상 복호화 장치 및 화상 부호화 장치 |
KR10-2003-7003943A KR100487986B1 (ko) | 1997-10-23 | 1997-10-23 | 화상 복호화 장치 |
KR10-2004-7017023A KR100531566B1 (ko) | 1997-10-23 | 1997-10-23 | 화상 복호화 장치 |
KR10-2004-7017022A KR100533443B1 (ko) | 1997-10-23 | 1997-10-23 | 화상 부호화 장치 |
KR10-2004-7017024A KR100511693B1 (ko) | 1997-10-23 | 1997-10-23 | 화상 복호화 장치 |
Family Applications Before (6)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR10-2004-7005173A KR100487988B1 (ko) | 1997-10-23 | 1997-10-23 | 부호화 비트 스트림 변환 장치 |
KR1020007004314A KR20010031320A (ko) | 1997-10-23 | 1997-10-23 | 화상 복호화 장치, 화상 부호화 장치, 화상 통신 시스템및 부호화 비트 스트림 변환장치 |
KR10-2004-7008424A KR100487989B1 (ko) | 1997-10-23 | 1997-10-23 | 화상 복호화 장치 및 화상 부호화 장치 |
KR10-2003-7003943A KR100487986B1 (ko) | 1997-10-23 | 1997-10-23 | 화상 복호화 장치 |
KR10-2004-7017023A KR100531566B1 (ko) | 1997-10-23 | 1997-10-23 | 화상 복호화 장치 |
KR10-2004-7017022A KR100533443B1 (ko) | 1997-10-23 | 1997-10-23 | 화상 부호화 장치 |
Country Status (7)
Country | Link |
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US (16) | US6862320B1 (ko) |
EP (1) | EP1032219B1 (ko) |
JP (1) | JP3573759B2 (ko) |
KR (7) | KR100487988B1 (ko) |
DE (1) | DE69721847T2 (ko) |
HK (1) | HK1030705A1 (ko) |
WO (1) | WO1999022524A1 (ko) |
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