KR100770849B1 - 무선 페이딩 환경에서의 압축된 비디오 정합 장치 및 방법 - Google Patents
무선 페이딩 환경에서의 압축된 비디오 정합 장치 및 방법 Download PDFInfo
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- KR100770849B1 KR100770849B1 KR1020060015552A KR20060015552A KR100770849B1 KR 100770849 B1 KR100770849 B1 KR 100770849B1 KR 1020060015552 A KR1020060015552 A KR 1020060015552A KR 20060015552 A KR20060015552 A KR 20060015552A KR 100770849 B1 KR100770849 B1 KR 100770849B1
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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
- H04N19/30—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability
- H04N19/36—Scalability techniques involving formatting the layers as a function of picture distortion after decoding, e.g. signal-to-noise [SNR] scalability
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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
- H04N19/115—Selection of the code volume for a coding unit prior to 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
- H04N19/10—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
- H04N19/132—Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
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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
- H04N19/134—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
- H04N19/154—Measured or subjectively estimated visual quality after decoding, e.g. measurement of distortion
-
- 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
- H04N19/164—Feedback from the receiver or from the transmission channel
- H04N19/166—Feedback from the receiver or from the transmission channel concerning the amount of transmission errors, e.g. bit error rate [BER]
-
- 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
- H04N19/31—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability in the temporal domain
-
- 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
- H04N19/39—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability involving multiple description coding [MDC], i.e. with separate layers being structured as independently decodable descriptions of input picture data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
Description
Claims (6)
- 무선 페이딩 환경에서의 압축된 비디오 정합 장치에 있어서,비디오 데이터를 부호화하여 압축 비트스트림으로 출력하는 인코더와;무선 채널의 SNR(Signal to Noise Ratio) 또는 CNR(Carrier to Noise Ration)를 측정하는 채널에러측정부와;상기 채널에러측정부에서 측정된 SNR 또는 CNR을 이용하여 현재 페이딩 상태가 저속 페이딩인지, 고속 페이딩인지 판단하며, 저속 페이딩으로 판단시에는 프레임 전송율을 줄이거나 비디오 품질을 변화하기 위한 제어신호를 출력하며, 고속 페이딩으로 판단될 경우에는, 상기 무선 채널의 데이터 출력 버퍼(buffer)의 크기를 크게 조절하기 위한 제어신호를 출력하는 인코더 최적화 모듈과;상기 인코더 최적화 모듈에서 출력되는 제어신호에 따라 프레임 전송율 또는 비트율을 선택하여 상기 인코더에 프레임 선택신호 또는 비트율 선택신호를 제공하는 시간적 계층화 선택부 및 품질 계층화 선택부를 포함함을 특징으로 하는 정합 장치.
- 제1항에 있어서, 상기에서 인코더는 H.264/AVC(Advanced Video Coding) 인코더임을 특징으로 하는 정합 장치.
- 제1항 또는 제2항에 있어서, 상기 인코더 최적화 모듈은상기 채널에러측정부에서 측정된 SNR 또는 CNR을 입력받아 BER 또는 FER을 계산하여 단위 시간당 변화량이 미리 설정된 임계치(threshold)보다 클 경우 현재 페이딩 상태가 고속 페이딩인 것으로 판단하며, 그렇지 않을 경우에는 저속 페이딩으로 판단하는 채널 페이딩 추정부와;상기 데이터 출력 버퍼의 크기를 제어하기 위한 버퍼 제어 신호를 출력하는 버퍼 제어부와;상기 채널 페이딩 추정부에서 저속 페이딩으로 판단시에는 프레임 전송율을 줄이거나 비디오 품질을 변화하기 위한 제어신호를 출력하며, 고속 페이딩으로 판단될 경우에는, 상기 데이터 출력 버퍼의 크기를 크게 조절하기 위한 제어신호를 상기 버퍼 제어부에 출력하는 인코더 최적화 제어부를 포함함을 특징으로 하는 정합 장치.
- 무선 페이딩 환경에서의 압축된 비디오 정합 방법에 있어서,주기적으로 무선 채널의 SNR(Signal to Noise Ratio) 또는 CNR(Carrier to Noise Ration)을 측정하는 과정과,상기 측정한 SNR 또는 CNR을 이용하여 BER(Bit Error Rate) 또는 FER(Frame Error Ratio)을 계산하는 과정과,상기 계산한 BER 또는 FER의 단위 시간당 변화량을 미리 설정된 임계치와 비교하는 과정과,상기 비교 결과 BER 또는 FER의 단위 시간당 변화량이 상기 임계치보다 클 경우에는 상기 무선 채널의 데이터 출력 버퍼의 크기를 크게 하는 과정을 포함함을 특징으로 하는 정합 방법.
- 제4항에 있어서, 상기 무선 채널의 데이터 출력 버퍼의 크기를 크게 한 후에, 상기 출력 버퍼가 수용 가능한 용량을 초과할 경우에는 프레임 전송율 또는 비트율을 조절함을 특징으로 하는 정합 방법.
- 제4항 또는 제5항에 있어서,상기 비교 결과 BER 또는 FER의 단위 시간당 변화량이 상기 임계치보다 작을 경우에는 프레임 전송율 또는 비트율을 조절하는 과정을 더 포함함을 특징으로 하는 정합 방법.
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KR1020060015552A KR100770849B1 (ko) | 2006-02-17 | 2006-02-17 | 무선 페이딩 환경에서의 압축된 비디오 정합 장치 및 방법 |
US11/652,336 US8194729B2 (en) | 2006-02-17 | 2007-01-11 | Apparatus and method for matching compressed video data under wireless fading environment |
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KR1020060015552A KR100770849B1 (ko) | 2006-02-17 | 2006-02-17 | 무선 페이딩 환경에서의 압축된 비디오 정합 장치 및 방법 |
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KR100770849B1 true KR100770849B1 (ko) | 2007-10-26 |
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US8194729B2 (en) | 2012-06-05 |
KR20070082664A (ko) | 2007-08-22 |
US20070195893A1 (en) | 2007-08-23 |
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