US Patent No: 5,612,900

Number of patents in Portfolio can not be more than 2000

Video encoding method and system which encodes using a rate-quantizer model

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Abstract

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A system and method for determining quantization level versus bit-rate characteristics of raw video signals in video frames during a pre-encoding phase for video technologies such as MPEG and MPEG-2. During a pre-encoding phase, various quantization levels are assigned to various parts of a frame, and the frame is then pre-encoded to determine a bit-rate for each quantization level used in the pre-encoding phase. Depending on the embodiment, quantization levels are assigned in one of many ways: checkerboard style, block style or any other distribution that avoids statistical anomalies. The method and system repeat the pre-encoding for plural frames, recording all quantization level versus bit-rate statistics on a frame by frame basis. These statistics are then used during encoding or re-encoding of a digital video to control the number of bits allocated to one segment of the digital video as compared to another segment, based on a target quality and target storage size for each segment. The resulting encoded digital video is stored on a digital storage medium, such as a compact disc.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
KABUSHIKI KAISHA TOSHIBATOKYO40080

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Azadegan, Faramarz Waltham, MA 17 883
Kitamura, Tetsuya Yasu, JP 58 1661
Mimura, Hideki Yokohama, JP 297 3890
Unno, Hiroaki Kunitachi, JP 295 2044

Cited Art Landscape

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Patent Citation Ranking

Forward Cite Landscape

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