The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 24, 2008
Filed:
Apr. 24, 2002
Yao-chung Lin, HsinChu, TW;
Chung-neng Wang, Ta Shu Township Kaohsiung County, TW;
Tihao Chiang, Fremont, CA (US);
Anthony Vetro, Short Hills, NJ (US);
Huifang Sun, Cranbury, NJ (US);
Yao-Chung Lin, HsinChu, TW;
Chung-Neng Wang, Ta Shu Township Kaohsiung County, TW;
Tihao Chiang, Fremont, CA (US);
Anthony Vetro, Short Hills, NJ (US);
Huifang Sun, Cranbury, NJ (US);
Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US);
Abstract
A method transcodes a compressed multi-layer video bitstream that includes a base layer bitstream and an enhancement layer bitstream. The base and enhancement layers are first partially decoded, and then the partially decoded signals are combined with a motion compensated signal yielding a combined signal. The combined signal is quantized into an output signal according to a quantization parameter, and the output signal is variable length encoded as a single layer bitstream. In a preprocessing step, the enhancement layer can be truncated according to rate control constraint, and the same constraints can also be used during the quantization.