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:
May. 14, 2013
Filed:
Mar. 10, 2009
Keisuke Matsumoto, Tokyo, JP;
Seiji Mochizuki, Tokyo, JP;
Kenichi Iwata, Tokyo, JP;
Fumitaka Izuhara, Tokyo, JP;
Motoki Kimura, Tokyo, JP;
Keisuke Matsumoto, Tokyo, JP;
Seiji Mochizuki, Tokyo, JP;
Kenichi Iwata, Tokyo, JP;
Fumitaka Izuhara, Tokyo, JP;
Motoki Kimura, Tokyo, JP;
Renesas Electronics Corporation, Kawasaki-shi, JP;
Abstract
The present invention provides an image encoding device which does not necessitate reference of a quantization parameter between consecutive macroblocks across a parallel processing area boundary without forming slices. The image encoding device encodes a macroblock of an encoding target image by parallel processing sequentially from the top of a parallel processing area, and possesses an encoding element for every parallel processing area. When all the quantized orthogonally-transformed coefficients of a top macroblock of the parallel processing area are zero, the encoding element adds a non-zero coefficient to a part of the coefficients, making the coefficients non-zero. Accordingly, generation of a skip macroblock in the top macroblock of each parallel processing area is suppressed. Since slice formation is not necessary, the prediction over a parallel processing area boundary is applied, and encoding efficiency improves. Errors are not generated in decoding and the decoded image quality does not deteriorate.