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Image decoder apparatus, image encoder apparatus and method and program thereof

A technology of image decoding and image encoding, which is applied in image communication, television, electrical components, etc., and can solve problems such as large amount of calculation

Inactive Publication Date: 2013-02-20
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In addition, regarding the H.264 / AVC format, since the search of the motion vector is performed in each of a plurality of block sizes, the amount of calculation is huge, so the processing time increases and the calculation circuit requires higher processing power

Method used

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  • Image decoder apparatus, image encoder apparatus and method and program thereof
  • Image decoder apparatus, image encoder apparatus and method and program thereof
  • Image decoder apparatus, image encoder apparatus and method and program thereof

Examples

Experimental program
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Embodiment Construction

[0056] Hereinafter, embodiments of the present invention will be described. Note that description will be made in the following order.

[0057] 1. Configuration of Image Coding Device

[0058] 2. Prediction method of motion vector

[0059] 3. Configuration of lossless coding unit

[0060] 4. Operation of image encoding device

[0061] 5. Configuration of image decoding device

[0062] 6. Configuration of lossless decoding unit

[0063] 7. Operation of image decoding device

[0064] 8. Other prediction methods for motion vectors

[0065] 9. Other configurations of the lossless coding unit

[0066] 10. Operation of lossless coding units in other configurations

[0067] 11. Other configurations of the lossless decoding unit

[0068] 12. Operation of the lossless decoding unit with other configurations

[0069] 13. Other prediction methods of motion vectors

[0070] 14. Other configurations and operations of the lossless coding unit

[0071] 15. Other configurations an...

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Abstract

A first decoder unit (521) decodes an encoded stream to acquire a differential motion vector. A second decoder unit (522) decodes the encoded stream to acquire predicted motion vector selection information. A motion vector selection unit (525) sets candidates of a predicted motion vector for a block to be decoded and selects, as the predicted motion vector, a motion vector, which is indicated by the predicted motion vector selection information, out of those candidates. An addition unit (526) adds the differential motion vector to the predicted motion vector, thereby calculating the motion vector of the block to be decoded. In this way, the predicted motion vector is optimized to improve the encoding efficiency and the picture quality.

Description

technical field [0001] The present invention relates to an image decoding device, an image encoding device, methods and programs thereof. More specifically, improvements in encoding efficiency and image quality will be achieved by performing optimization of predicted motion vectors. Background technique [0002] In recent years, in broadcasting and general household equipment, in order to perform efficient information transmission and storage on the fly, devices that digitally process image information, such as conforming to formats such as MPEG to pass orthogonal transforms such as discrete cosine transforms, have come to be widely used and motion compensation to compress images. [0003] In particular, MPEG2 (ISO / IEC 13818-2) is defined as a general-purpose image encoding format, and thus is now widely used in a wide range of applications for professional use and consumer use. By adopting the MPEG2 compression format, for example, in the case of an interlaced image havin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/32H04N19/50H04N19/105H04N19/136H04N19/176H04N19/189H04N19/19H04N19/423H04N19/46H04N19/503H04N19/51H04N19/513H04N19/60H04N19/61H04N19/70H04N19/80H04N19/82H04N19/85H04N19/91
CPCH04N19/0003H04N19/00696H04N19/00533H04N19/0066H04N7/26335H04N7/2684H04N19/107H04N19/44H04N19/56H04N19/176
Inventor 近藤健治
Owner SONY CORP
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