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Memory device, signal processing apparatus, image signal processing apparatus and methods of the same

A technology of signal processing and storage equipment, which is applied in the field of storage equipment, signal processing equipment, image signal processing equipment and signal processing, and can solve the problems of expensive image compression processing and large amount of calculation

Inactive Publication Date: 2005-01-12
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0035] Since the block matching algorithm explained above repeats the calculation of formula (1), there is a defect that the amount of calculation becomes extremely large, and image compression processing such as MPEG takes most of the time for this

Method used

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  • Memory device, signal processing apparatus, image signal processing apparatus and methods of the same
  • Memory device, signal processing apparatus, image signal processing apparatus and methods of the same
  • Memory device, signal processing apparatus, image signal processing apparatus and methods of the same

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no. 1 example

[0091] FIG. 7 is a block diagram showing a first embodiment of a motion detection device as a main part of the image processing apparatus according to the present invention.

[0092] The motion detection device is equipped with an ME memory that stores position information by using the feature as an address, and performs matching processing by using the surrounding pixel values ​​as a feature, so that the motion vector can be accurately estimated with a small amount of calculation.

[0093] The specific structure and functions of the motion detection device will be described in detail below with reference to the accompanying drawings.

[0094] The motion detection device 20 includes a second frame memory 21 as a first data storage section, a second frame memory 22 as a second data storage section, an ME memory 23 and a matching section 24 as a matching section.

[0095] Note that the first frame memory 21 constitutes the first feature extraction means according to the present ...

no. 2 example

[0165]FIG. 12 is a block diagram showing a second embodiment of a motion detection device as an image processing apparatus of the present invention.

[0166] The second embodiment differs from the above-described first embodiment in that matching with preferred features becomes possible by providing the class generating sections 25-1 and 25-2 as feature generating means for obtaining features. Note that, as shown in FIG. 13, it is also possible to provide a structure of the class generation section 25 as in FIG. As a function of this circuit, it also has the functions of the class generating sections 25-1 and 25-2.

[0167] The class generating section 25-1 receives information of the current frame Fc of the first frame memory 21, generates ADRC-based quantization codes as characteristics of the current frame, and outputs to the matching section 24A.

[0168] In addition, the class generation section 25 - 2 receives the information of the reference frame Fr of the second fram...

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Abstract

A memory device, a signal processing apparatus, and an image signal processing apparatus and signal processing methods configured to perform matching processing with a small amount of calculation and accurately detecting motion vectors, provided with a memory for converting by using a feature including a pixel value in a certain block range having a focused pixel at its center as an address based on information of a reference frame stored in a second frame memory; and a matching portion for reading storage information of the ME memory by using a feature of a focused pixel included in information of a current frame supplied from a first frame memory as a feature address, calculating a distance between the focused pixel in the current frame and a feature address (position coordinates) read from the ME memory, and detecting differential coordinates based on position information having the minimum distance from a plurality of candidates as motion vectors of the focused pixel.

Description

technical field [0001] The present invention relates to a storage device, a signal processing device, an image signal processing device and a signal processing method suitable for processing requiring matching, such as motion detection means and object search means used in moving image compression devices. Background technique [0002] Matching processing of signals, especially image signals, has problems that generally lead to a large amount of computation. Motion vector detection by block matching as described below is an example of using matching processing. [0003] That is, in an image signal processing apparatus, motion detection, which obtains a motion vector indicating motion of an image, is one main technique for efficiently realizing moving image compression. Several methods of obtaining motion vectors have been proposed, but one main method is a method called a block matching algorithm. [0004] FIG. 1 is a block diagram showing a configuration example of a moti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/423H04N19/50H04N19/51H04N19/98
CPCH04N19/00509H04N19/00781H04N19/00981H04N19/00484H04N19/423H04N19/43H04N19/61H04N19/98G06T7/20H04N5/91H04N19/51
Inventor 近藤哲二郎吉川和志石桥淳一和田成司
Owner SONY CORP
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