Unlock instant, AI-driven research and patent intelligence for your innovation.

Video data processing method and video data detection method

A technology of video data and processing method, which is applied in the field of data transmission, can solve the problem of low error detection rate and achieve the effect of simple operation and high detection rate

Inactive Publication Date: 2015-04-01
SICHUAN JIUZHOU ELECTRIC GROUP
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the error detection rate of existing error detection methods is low, so an effective error detection method is of great importance.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Video data processing method and video data detection method
  • Video data processing method and video data detection method
  • Video data processing method and video data detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiments of the present invention provide a method for processing video data, such as figure 1 As shown, the processing method includes:

[0040] Step S101. Obtain discrete cosine transform coefficients of quantized macroblocks.

[0041] For the compression coding of video data, the first step of compression needs to divide the image into many small blocks, and transform each small block so that it is transformed from a spatial domain signal to a time domain signal. Each small block is a macroblock. This transformation from the space domain to the time domain mostly uses 8*8 discrete cosine transform (Discrete Cosine Transform, DCT for short). After DCT transformation, the 8*8 space domain pixel matrix is ​​transformed into an 8*8 frequency domain signal matrix. The transformation can completely retain the information of all 8*8 pixel blocks, so the Inverse Discrete Cosine Transform (IDCT) can completely restore the original 8*8 pixel matrix from the 8*8 frequency ...

Embodiment 2

[0071] An embodiment of the present invention provides a video data detection method, which is a detection method corresponding to the video data processing method provided in Embodiment 1. Such as Figure 4 As shown, the detection method includes:

[0072] Step S201. Receive video data, perform entropy decoding, and obtain discrete cosine transform coefficients of macroblocks of the video data.

[0073] Step S202, scanning the discrete cosine transform coefficients to obtain a one-dimensional array of AC coefficients related to the discrete cosine transform coefficients.

[0074] Similar to Embodiment 1, the discrete cosine transform coefficients of the macroblocks can also be scanned by using the zigzag scanning method to obtain a one-dimensional array of AC coefficients of the discrete cosine transform coefficients, which will not be repeated here.

[0075] Step S203, obtaining non-zero AC coefficients in the one-dimensional array and their positions in the one-dimensiona...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a video data processing method and a video data detection method and belongs to the technical field of data transmission. The video data detection method is beneficial to increasing the error detection rate of a receiving end and is an effective error detection method. The video data processing method comprises the first step of acquiring quantized discrete cosine transformation coefficients of macro blocks, the second step of scanning the quantized discrete cosine transformation coefficients to obtain a one-dimensional array of exchange coefficients related to the discrete cosine transformation coefficients, the third step of acquiring nonzero exchange coefficients in the one-dimensional array and the positions of the nonzero exchange coefficients in the one-dimensional array, and the fourth step of adding fragile watermarks to the nonzero exchange coefficients according to the positions and the parity of the nonzero exchange coefficients. The video data detection method comprises the first step of receiving video data and conducting entropy decoding to obtain the discrete cosine transformation coefficients of the video data, the second step of acquiring the nonzero exchange coefficients in the one-dimensional array and the positions of the nonzero exchange coefficients in the one-dimensional array, and the third step of detecting whether transmission errors exist in the macro blocks according to the positions and the parity of the nonzero exchange coefficients.

Description

technical field [0001] The invention relates to the field of data transmission, in particular to a video data processing method and detection method. Background technique [0002] In recent years, multimedia data communication has been widely used in the Internet. However, multimedia data has a large amount of information and requires a high transmission network bandwidth, which will inevitably increase the difficulty and cost of multimedia data transmission. Therefore, since the International Telecommunication Union Telecommunication Standardization Organization (ITU-T) issued the first digital video compression coding standard H.261 in 1989, video compression coding standards such as H.263 and H.230, H. 323 and other multimedia terminal standards. In March 2003, ITU-T promulgated the H.264 video coding compression standard. The H.264 video compression coding standard is proposed to meet the growing and higher compression requirements for moving images in various applica...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04N19/89H04N19/467
Inventor 李汶隆刘念林
Owner SICHUAN JIUZHOU ELECTRIC GROUP