Image analysis – Image compression or coding – Adaptive coding
Reexamination Certificate
2007-12-25
2007-12-25
Couso, Jose L. (Department: 2624)
Image analysis
Image compression or coding
Adaptive coding
Reexamination Certificate
active
11147308
ABSTRACT:
A video frame is input to a spectrum analyzer, which transforms the frame from a spatial domain into a frequency domain. A resolution determiner analyzes the output of the spectrum analyzer, thereby selecting a resolution appropriate for the video frame. Then, a resolution converter converts a resolution of the video frame into the resolution selected by the resolution determiner. Thereafter, the video frame is subjected to a coding process by block divider, DCT transformer, quantizer and variable-length coder so as to be output as a coded bit stream. By coding the input video frame at a resolution corresponding to the high-frequency component in the frame, a video of higher quality can be obtained with the bit rate reduced.
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Fukuda Hideki
Iwasaki Shiro
Kawasaki Kojiro
Kondo Satoshi
Nakamura Kazuhiko
Couso Jose L.
Matsushita Electric - Industrial Co., Ltd.
Nixon & Peabody LLP
Studebaker Donald R.
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