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:
Jul. 15, 1997
Filed:
May. 08, 1995
Hsun-Chang Hsieh, Hsinchu, TW;
Industrial Technology Research Institute, Chutung, TW;
Abstract
The present invention relates to variable length coding (VLC). Variable length coding is a widely-used method in data compression, especially, in the applications of video data communication and storage. Many international standards have adopted this technique in video data compression, for example, JPEG, MPEG, CCITT H.261 and so on. Various implementation methods have been proposed for variable length coding. Most of those methods implement the coding with two-field codes. That is, a code is represented by a code word and a code length. However, in this invention, a three-field representation is used for each code. In comparison with the two-field method, this method not only reduces the storage requirements of the code-book but also reduces the hardware or cost to implement a variable length encoder. Moreover, variable length coding can be implemented using both parallel VLC encoders and serial VLC encoders.
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