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High-effective VLSI implement structure of JEPG2000 medium-small wave transformation algorithm

A wavelet transform and address technology, which is applied in the field of VLSI implementation structure of discrete wavelet transform units, can solve the problems of system storage unit distribution and scheduling not being elaborated in detail, structural flexibility and processing speed are not very ideal, etc.

Inactive Publication Date: 2007-10-31
FUDAN UNIV
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Problems solved by technology

Among them, the structure of C.J.Lian et al. of National Taiwan University has more significant advantages, but they only describe the wavelet transform processing unit, and do not elaborate on the distribution and scheduling of the system storage unit.
In addition, Arizona State University K.Andra et al. proposed a wavelet transform VLSI structure dedicated to JPEG2000, and elaborated on the structure; however, its structure is not ideal in terms of flexibility and processing speed.

Method used

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  • High-effective VLSI implement structure of JEPG2000 medium-small wave transformation algorithm
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  • High-effective VLSI implement structure of JEPG2000 medium-small wave transformation algorithm

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Embodiment Construction

[0034] Basic Control Unit

[0035] The basic control unit is responsible for the control and data scheduling of each module in the control system, including: when controlling the forward / reverse wavelet transform, the address generation unit (AGU) generates address signals for reading / writing external storage units; when controlling the forward / reverse wavelet transform The address generation unit (AGU) generates the address signal for reading / writing the internal storage unit; controls the data scheduling of the pipeline processing of the wavelet processing unit during the forward / reverse wavelet transformation; controls the data extension mode selection of the wavelet processing unit, etc. The unit is mainly based on a two-way countable counter, and the counting range of the counter is: (0-M-1); M is given by formula (1):

[0036] M = N × N 2 + ...

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Abstract

The present invention relates to a VLSI structure applicable to JPEG2000 medium-small wave transformation algorithm. It is based on pipeline operation and several limited state machine control modes. It includes bask control unit, reading / writing data address production unit, one-dimensional small wave transformation processing unit and interior data storage unit. It can implement small wave forward and backward transformation processing, and can select correspondent small wave filter according to the requirements and two-dimensional image to raise frequency of small wave transformation. Under the condition of increasing small quantity of storage unit it can obvious improve design complexity and processing speed.

Description

technical field [0001] The present invention mainly relates to the VLSI implementation structure of the discrete wavelet transform unit in the core coding part of the latest international static image compression standard - JPEG2000 (standard number: 15444-1). Background technique [0002] JPEG2000 is the latest still image compression standard formulated by the Joint Photographic Experts Group (JPEG) in December 2000. Since JPEG2000 adopts a variety of excellent processing algorithms in the field of static image compression in recent years, it has many new functions and features; for example, it improves the compression performance of images, supports both lossless and lossy compression, and has multiple An optional transmission method (by resolution, by image quality and by image components, etc.), as well as functions such as region-of-interest coding. In addition, it has robustness to errors, random access to the code stream and processing characteristics. Due to the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/38G06F12/10G06T11/00G06F12/1072
Inventor 朱珂华林周晓方章倩苓
Owner FUDAN UNIV
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