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Image decoding device, image decoding method, integrated circuit, and reception device

An image decoding and image technology, applied in image communication, television, electrical components, etc., can solve problems such as poor processing efficiency and image quality degradation, and achieve the effect of preventing image quality degradation and efficient decoding processing

Inactive Publication Date: 2011-02-23
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, degradation of the image quality of the image obtained by the decoding process involving motion compensation often occurs.
In addition, in prior art B, the obtained pixels may not be used for motion compensation, and the processing efficiency is not good.

Method used

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  • Image decoding device, image decoding method, integrated circuit, and reception device
  • Image decoding device, image decoding method, integrated circuit, and reception device
  • Image decoding device, image decoding method, integrated circuit, and reception device

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no. 1 Embodiment approach

[0149] image 3 It is a configuration diagram of the image decoding device 1000 according to the first embodiment of the present invention. The image decoding device 1000 is a device conforming to the MPEG2 standard. The operation of the image decoding device 1000 will be described below.

[0150] image 3 The illustrated image decoding device 1000 includes a variable length decoding unit 301, an inverse quantization unit 302, an inverse orthogonal transformation unit 303, an adder 304, a motion vector calculation unit 305, a motion compensation unit 306, an image acquisition unit 307, and an image memory 308. . In addition, since the processing performed by each unit other than the image acquisition unit 307 included in the image decoding device 1000 conforms to the MPEG2 standard, it will not be described in detail.

[0151] The variable length decoding unit 301 acquires a bit stream from the outside. It is assumed that this bit stream is encoded data obtained by encodi...

no. 2 Embodiment approach

[0324] Figure 15 It is a configuration diagram of an image decoding device 1000A according to the second embodiment of the present invention.

[0325] Image decoding device 1000A is a device conforming to the H.264 standard. Hereinafter, the operation of the image decoding device 1000A will be described.

[0326] Figure 15 The illustrated image decoding device 1000A includes a variable length decoding unit 1201, an inverse quantization unit 1202, an inverse orthogonal transformation unit 1203, an adder 1204, a motion vector calculation unit 1205, a motion compensation unit 1206, an image acquisition unit 1207, and an image memory 1208. , an intra prediction unit 1209 , a selection unit 1210 , and a deblocking filter unit 1211 . In addition, since the processing performed by each unit other than the image acquisition unit 1207 included in the image decoding device 1000A conforms to the H.264 standard, detailed description thereof will not be given.

[0327] The variable l...

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Abstract

An image memory access control section (502) judges whether or not an additional pixel, which is a pixel other than a plurality of pixels constituting an image indicated by a reference target block and which is a pixel required for motion compensation, is required. An unacquired pixel interpolation section (503) generates one or more additional pixels and generates a reference image used for the motion compensation from the generated one or more additional pixels and at least part of the image indicated by the reference target block, if it is judged that the additional pixel is required. The unacquired pixel interpolation section (503) outputs at least the part of the image indicated by the reference target block as the reference image, if it is judged that no additional pixel is required.

Description

technical field [0001] The present invention relates to an image decoding device, an image decoding method, an integrated circuit, and a receiving device for decoding encoded data obtained by encoding moving pictures with inter-image motion prediction. Background technique [0002] In recent years, image coding techniques based on the MPEG2 standard (Non-Patent Document 1) or the H.264 (Non-Patent Document 2) standard are widely used in order to compress video data. In these image coding techniques, motion prediction (hereinafter also referred to as motion compensation) is performed on at least a part of a plurality of pictures constituting a moving image. [0003] Motion prediction is a process of detecting a motion vector from a picture to be processed and a reference picture, and generating a predicted picture. Here, the reference picture is a picture referred to in motion prediction. Also, a reference picture is a picture temporally preceding or following a picture to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/32
CPCH04N19/00303H04N19/00533H04N7/364H04N19/00739H04N19/00515H04N19/182H04N19/433H04N19/44H04N19/523
Inventor 小泽基一今仲隆晃法贵光典
Owner PANASONIC CORP
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