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A pulse sequence compression method and system

A technology of pulse sequence and compression method, which is applied in image communication, digital video signal modification, electrical components, etc. It can solve the problems of large transmission bandwidth and storage space, inability to integrate video codec standards, large data volume, etc., and achieve complexity low effect

Active Publication Date: 2020-05-29
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the extremely high frame rate of DVS and the large amount of data, it needs to occupy a very large transmission bandwidth and storage space. Objectively, the requirements for software and hardware are too high
In addition, the existing DVS pulse sequence processing method cannot be integrated into the latest video codec standard, and subsequent operations such as compression cannot be performed

Method used

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  • A pulse sequence compression method and system
  • A pulse sequence compression method and system
  • A pulse sequence compression method and system

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Embodiment 1

[0040] The lossless compression coding algorithm of embodiment 1 pulse sequence

[0041] Specifically, such as figure 1 As shown, according to one aspect of the present invention, the present invention proposes a kind of pulse sequence compression method, comprises the steps:

[0042] S1. Convert pulse signal to grayscale image sequence

[0043]Since the pulse sequence is stored in the format of address plus time, each signal is represented by a quadruple (x, y, t, p) with a fixed number of bits, and x and y represent the abscissa and y of the pulse signal on the image, respectively. On the ordinate, p represents the polarity of the pulse signal (expressed in 1 bit, the value is 0 or 1), and t represents the time axis. The invention transfers the pulse signal to the image domain, and then converts each consecutive n frames into an n-bit-depth image, and finally performs lossless compression in the form of image coding, which can greatly reduce the transmission bandwidth an...

Embodiment 2

[0067] Such as Figure 5 As shown, it is a schematic structural diagram of the lossless compression coding system 10 provided by the present invention, including:

[0068] Conversion module 11, is used for converting original pulse signal into grayscale image sequence;

[0069] A block division module 12, configured to perform block division on the grayscale image sequence to obtain several sub-blocks;

[0070] A prediction module 13, configured to predict each sub-block to obtain a predicted pixel value, and calculate the residual between the real value and the predicted pixel value;

[0071] The entropy coding module 14 is configured to further compress the block division information, prediction information and residual information through entropy coding, and store them as a binary code stream.

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Abstract

The invention mainly provides a pulse sequence compressing method and system. The method comprises the following steps: converting an original pulse signal into a grey-scale map sequence; performing block partition on the grey-scale map sequence to obtain a plurality of sub-blocks; predicting each sub-block to obtain a predicted pixel value, and calculating a residual error between a real value and the predicted pixel value; and further compressing information of the block partition, prediction information and residual error information through entropy coding, and storing the compressed information as a binary code stream. Through adoption of the method, the relevance of the pulse sequence signal on the aspects of space and time is fully utilized, so that the pulse sequence is effectivelycompressed. As proved by experimental results, the method has the advantages that the pulse sequence can be compressed remarkably, and can be effectively applied to compression, transmission and storage systems of practical pulse sequence content.

Description

technical field [0001] The invention belongs to the field of digital signal processing, in particular to a method and system for compressing pulse sequences recorded by dynamic vision sensors (DVS, Dynamic Vision Sensors). Background technique [0002] Dynamic vision sensors sense and encode the world by mimicking the retina and use it as neural signals to obtain visual information, so dynamic vision sensors are promising neuromorphic vision sensors for autonomous motion control of mobile robots. Although researchers have used various sensors to perceive the environment, such as frame-based cameras, structured light sensors, and stereo cameras, etc., there are still many limitations and flaws. As a promising solution, dynamic vision sensors work by simulating the retina and responding to pulses generated by pixel-level brightness changes in a scene due to motion. Compared with traditional frame-based cameras, especially for moving fields, DVS has great advantages in data ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/13H04N19/176H04N19/573H04N19/59H04N19/70
CPCH04N19/13H04N19/176H04N19/573H04N19/59H04N19/70
Inventor 马思伟李洋王苫社张翔
Owner PEKING UNIV