Image decoding unit, image encoding/ decoding devices using image decoding unit, and method thereof

An image decoding and encoding technology, applied in the high-speed field, can solve problems such as insufficient response to motion compensation

Inactive Publication Date: 2004-12-01
SOCIONEXT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0031] As clear from the above description, the conventional technology cannot sufficiently deal with the case of effectively and rapidly processing the motion compensation with decimal precision obtained in the latest image standard.

Method used

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  • Image decoding unit, image encoding/ decoding devices using image decoding unit, and method thereof
  • Image decoding unit, image encoding/ decoding devices using image decoding unit, and method thereof
  • Image decoding unit, image encoding/ decoding devices using image decoding unit, and method thereof

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no. 1 Embodiment

[0107] image 3 It is a structural diagram of the image decoding unit 100 in the first embodiment of the present invention. The image decoding unit 100 of this embodiment includes: a decoding processing unit 110, a data storage unit 120, a reconstruction operation unit 130, and a frame memory 140. The decoding processing unit 110 has an entropy decoding unit 111, a motion compensation unit 112, and an inverse quantization unit. 113. An inverse DCT section 114. The data storage section 120 has a data storage A121 and a data storage B122.

[0108] Furthermore, the decoding processing unit 110 is connected to the data memory unit 120 via a data bus 161. The data memory unit 120 is further connected to the reconstruction computing unit 130 via a data bus 162, and connected to the frame memory 140 via a data bus 164. The reconstruction computing unit 130 is further connected to the frame memory 140 via the data bus 163.

[0109] Moreover, the image decoding unit 100 of the present inv...

no. 2 Embodiment

[0131] Figure 4 It is a block diagram of an image coding apparatus in the second embodiment of the present invention. The image encoding device of this embodiment includes an input terminal 201, an output terminal 202, an image decoding unit 100, a subtraction calculation unit 210, a DCT unit 212, a quantization unit 213, an entropy encoding unit 214, a transmission buffer 215, and a motion detection unit 216.

[0132] The input terminal 201 is connected to the input of the subtraction calculation section 210 and the input of the motion detection section 216, the other input of the subtraction calculation section 210 is connected to the terminal Td154 of the image decoding unit 100, and the output of the subtraction calculation section 210 is connected to the input of the quantization section 213 . The output of the quantization section 213 is connected to the input of the entropy encoding section 214 and the terminal Tb152 of the image decoding unit 100. The other input of the ...

no. 3 Embodiment

[0140] Figure 5 It is a structural diagram of an image decoding device in the third embodiment of the present invention. The image decoding device of this embodiment includes an input terminal 301, a receiving buffer 310, and an image decoding unit 100. The input terminal 301 is connected to the input of the receiving buffer 310, and the output of the receiving buffer 310 is connected to the terminal Ta151 of the image decoding unit 100. Also, the terminal Te155 of the image decoding unit 100 is connected to an external image display device 320. The terminal Tb152, the terminal Tc153, and the terminal Td154 of the image decoding unit 100 are not connected at all.

[0141] Figure 5 The image decoding unit 100 shown, and image 3 The structure and function of the image decoding unit 100 shown are completely the same, and the same reference numerals are assigned to the respective structural elements, and the description is omitted.

[0142] The outline of the operation of the ima...

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Abstract

An image decoding unit (100) comprises a decoding unit (110), a data memory unit (120), a reconstruction unit (130), and a frame memory (140). The decoding unit (110) includes an entropy decoder (111), a motion compensator (112), an inverse quantizer (113), and an inverse DCT unit (114). The data memory unit (120) includes a data memory A (121) and a data memory B (122). In the middle of the data transfer from the data memory unit (120) to the frame memory (140), the reconstruction unit (130) that inputs intermediate data of decoding and outputs reconstructed image data is provided; thereby, the processing of generating the reconstructed image data and the processing of storing the reconstructed image data into the frame memory (140) can be performed in parallel. By the structure, a high-speed processing of image reconstruction can be performed.

Description

Technical field [0001] The present invention relates to an image decoding unit and an image encoding device, an encoding method, an image decoding device, and a decoding method using the image decoding unit, and in particular to a technology that can achieve high-speed processing in the process of generating a reconstructed image. Background technique [0002] In recent years, with the rapid spread of information equipment and information terminal equipment that use moving images, technology for compressing moving images has become more noticeable. [0003] Moving picture compression technology realizes technical standardization through MPEG-2 and MPEG-4 determined by MPEG (Moving Picture Experts Group), and H.261, H.263, and H.264 determined by ITU (Intemational Telecommunication Union). . The moving image compression technology in these specifications utilizes the strong correlation between adjacent frames of the moving image to perform high compression. [0004] First of all, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/50G06K9/36H03M7/30H03M7/36H03M7/40H04N19/423H04N19/436H04N19/503H04N19/51H04N19/513H04N19/523H04N19/61H04N19/625H04N19/91
CPCH04N19/00781H04N7/50H04N7/26335H04N19/00739H04N19/00521H04N19/00533H04N19/00484H04N19/00478H04N7/26707H04N7/362H04N7/26702H04N19/00733H04N7/364H04N7/26755H04N19/51H04N19/61H04N19/44H04N19/42H04N19/423H04N19/436H04N19/523
Inventor 滨田真纳九郎丸俊一
Owner SOCIONEXT INC
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