A TV signal resampling processing method and device

A TV signal and processing method technology, applied in the field of video processing, can solve the problems of increasing costs and achieve the effect of reducing costs

Active Publication Date: 2021-05-04
WUXI ZGMICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional resampling algorithm uses polyphase interpolation filtering. In order to achieve a high-precision algorithm, it is necessary to increase the order of the filter and the number of phases between sampling points, which will greatly increase the cost.

Method used

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  • A TV signal resampling processing method and device
  • A TV signal resampling processing method and device
  • A TV signal resampling processing method and device

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0041] An embodiment of the present application provides a television signal resampling processing method, which will be described below.

[0042] image 3 It shows a schematic flowchart of the implementation of the TV signal resampling processing method provided by the embodiment of the present application. As shown in the figure, the method may include:

[0043] Step 301, determine the input sampling signal Datain;

[0044] Step 302: Generate M sets of N-order filter coefficients and M+1 sets of N-order filter coefficients respectively according to the preset filter order N and the phase number M between two adjacent input sampling signals;

[0045] Step 303, calculate the value TruncOut of the output sampling signal according to the determined N input sampling signals and the M groups of N-order filter coefficients TruncCoef[N][M];

[0046] Step 304. Calculate the compensation value DeltaOut of the output sampling signal according to the determined N input sampling signal...

Embodiment 2

[0118] In the embodiment of the present application, the sampling signal with a sampling rate of 27MHz is resampled to a sampling rate of 4Fsc (NTSC system: 14.318180M, PAL system: 17.734475M, taking the output sampling rate of PAL system as an example, that is, the output sampling rate is 17.734475M) Take the sampled signal as an example to describe in detail.

[0119] In the embodiment of the present application, the phase means that any two sampling points of the input sampling signal are equally divided into several small segments, and each small segment is a phase phase, and each phase has an independent filter coefficient. In the embodiment of the present application, the number of bits for setting the phase is m=4, and the number of phases is M=2 m =16, the filter order N=10.

[0120] In the embodiment of the present application, the resampling process is performed through two aspects of polynomial interpolation filtering and local linear interpolation. Assume that the ...

Embodiment 3

[0147] Based on the same inventive concept, the embodiment of the present application also provides a television signal resampling processing device, the problem-solving principle of which is similar to that of the television signal resampling processing method, and repeated descriptions will not be repeated.

[0148] Figure 5 A schematic structural diagram of a TV signal resampling processing device in an embodiment of the present application is shown. As shown in the figure, the device may include:

[0149] An input module 501, configured to determine an input sampling signal Datain;

[0150] A polynomial coefficient module 502, configured to generate M groups of N-order filter coefficients according to the preset filter order N and the phase number M between two adjacent input sampling signals;

[0151] The linear coefficient module 503 is used to generate M+1 groups of N-order filter coefficients according to the preset filter order N and the phase number M between two a...

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Abstract

An embodiment of the present application provides a TV signal resampling processing method and device, including: determining the input sampling signal; according to the preset filter order N and the phase number M between two adjacent input sampling signals, respectively generate M A group of N-order filter coefficients and M+1 groups of N-order filter coefficients; calculate the value of the output sample signal according to the determined N input sample signals and the M groups of N-order filter coefficients; according to the determined N input sample signals and the M+1 sets of N-order filter coefficients are used to calculate the compensation value of the output sampling signal; the value of the output sampling signal is compensated by using the compensation value of the output sampling signal to obtain a resampled output sampling signal. This application combines polyphase interpolation filtering with local linear interpolation compensation. Under the same SNR, the order of polyphase interpolation filtering and the number of phases between sampling points can be reduced, thereby greatly reducing costs.

Description

technical field [0001] The present application relates to video processing technology, and in particular, to a method and device for resampling a television signal. Background technique [0002] With the wide application of video surveillance, in order to meet the requirements for image quality, video decoding processing capability is particularly important. In the field of video surveillance, analog surveillance cameras usually use composite video stream CVBS for transmission. Compared with other analog transmission methods, composite video stream can make the transmission distance longer, but due to the brightness signal (Y) and The chrominance signal (C) is transmitted in combination, and the composite video signal needs to be decoded into luminance signal and chrominance signal at the receiving end. The CVBS analog TV signal sent from the monitoring probe is sampled by the analog-to-digital converter ADC into 27Msps 10bit data, and then the field time base information i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/14H04N5/213H04N7/18
Inventor 瞿军武施彦薛骏
Owner WUXI ZGMICRO ELECTRONICS CO LTD
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