[특허]Error concealment apparatus for HDTV receivers

Error concealment apparatus for HDTV receivers 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04N-005/21
출원번호	US-0844322 (1992-03-02)
발명자 / 주소	Sun Huifang (Princeton NJ) Zdepski Joel W. (Lebanon NJ)
출원인 / 주소	RCA Thomson Licensing Corporation (Princeton NJ 02)
인용정보	피인용 횟수 : 102 인용 특허 : 0

초록 ▼

Image reproduction is improved in an MPEG-like television receiver by inclusion of post-processing adaptive error concealment. Compressed video signal is examined to determine blocks of video signal containing errors, and error tokens are generated for identifying corresponding blocks of decompressed pixel values. Pixel values adjacent the decompressed blocks of pixel values containing errors are examined to generate estimates of the relative image motion and image detail in the area of such blocks. The block of pixel values is replaced with temporally displaced co-located blocks of pixel values or interpolated data depending upon whether the estimate of image motion is lesser or greater than the estimate of image detail.

대표청구항 ▼

Adaptive error concealment apparatus, for concealing errors in video signal decoded as blocks of pixels, comprising: a source of video signal occurring in blocks of coded data representing respective image areas, each area being represented by a plurality of pixels; means coupled to said source for detecting errors in said blocks of coded data, generating error tokens indicating blocks of coded data containing errors, discarding blocks of coded data with errors, and passing error free blocks of coded data; means for decoding said error free blocks of coded data on a block-by block basis, and generating corresponding blocks of pixel values representing said image areas; means, responsive to said error tokens and pixel values, for generating a first indicia related to the amount of image detail in at least one block of pixel values adjacent to a discarded block of pixel values; means, responsive to said error tokens and pixel values, for generating a second indicia related to image movement in said at least one block of pixel values adjacent to said discarded block of pixel values, with respect to an image in a previously decoded frame; means for comparing said first and second indicia, and providing first and second types of pixel data for said discarded block of pixel values, if the amount of image detail is greater and lesser then said image movement respectively.

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연합인증

Error concealment apparatus for HDTV receivers 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허를 인용한 특허 (102)

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Error concealment apparatus for HDTV receivers 원문보기

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연구과제 타임라인

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