Picture data transmission method and device

Patent metadata

Field	Value
Publication number	US-10812679-B2
Application number	US-201715607927-A
Country	US
Kind code	B2
Filing date	May 30, 2017
Priority date	Dec 16, 2014
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

A picture data transmission method and device are disclosed in the present invention. The picture data transmission method comprises: recoding a first picture to be transmitted, by a picture data sending terminal, to obtain a second picture, wherein the file size of the second picture is smaller than that of the first picture, and a quality difference between the second picture and the first picture is less than a pre-set threshold; and selecting one of the first picture and the second picture according to quality values of the first picture and the second picture and sending the selected picture to a picture data receiving terminal. According to the present invention, pictures can be recoded to obtain pictures with a small amount of data for data transmission, without affecting the picture quality, thereby saving network resources and reducing storage pressure.

First claim

The invention claimed is:

1. A picture data transmission method, comprising:
recoding a first picture to be transmitted, by a picture data sending terminal, to obtain a second picture, wherein a file size of the second picture is smaller than a file size of the first picture;
determining whether a picture quality of the second picture is higher than a pre-set value;
selecting one of the first picture and the second picture based on whether the picture quality of the second picture is higher than the pre-set value; and
sending the selected picture to a picture data receiving terminal.

2. The picture data transmission method according to claim 1 , wherein the determining whether the picture quality of the second picture is higher than the pre-set value comprises:
determining whether a picture quality related parameter of the second picture is higher than a threshold value, the picture quality related parameter comprising resolution or brightness.

3. The picture data transmission method according to claim 1 , further comprising performing, by the picture data receiving terminal, a corresponding reverse recoding according to data of the second picture received to obtain a third picture.

4. The picture data transmission method according to claim 1 , wherein a picture format of the first picture is JPEG, GIF, BMP, PNG, ico or tiff, and a picture format of the second picture is WEBP or HEVC.

5. The picture data transmission method according to claim 3 , wherein a picture format of the third picture is the same as a picture format of the first picture.

6. A picture data transmission device, comprising:
a first picture format conversion unit configured to recode a first picture to be transmitted to obtain a second picture, wherein a file size of the second picture is smaller than that of the first picture; and
a picture data transmission unit configured to select one of the first picture and the second picture according to a picture quality of the first picture and a picture quality of the second picture and send the selected picture to a picture data receiving terminal, wherein a picture quality difference between the second picture and the first picture is less than a pre-set threshold.

7. The picture data transmission device according to claim 6 , wherein the picture data transmission unit comprises:
a determining sub-unit configured to determine whether the picture quality of the second picture is higher than a pre-set value; and
a picture sending sub-unit configured to send, if the picture quality of the second picture is higher than the pre-set value, the second picture to the picture data receiving terminal, and send, if the picture quality of the second picture is lower than the pre-set value, the first picture to the picture data receiving terminal.

8. A non-transitory computer readable medium comprising program instructions which, when executed by a computer, cause the computer to perform a method of:
recoding a first picture to be transmitted, by a picture data sending terminal, to obtain a second picture, wherein a file size of the second picture is smaller than a file size of the first picture;
determining whether a picture quality of the second picture is higher than a pre-set value;
selecting one of the first picture and the second picture based on whether a picture quality of the second picture is higher than a pre-set value; and
sending the selected picture to a picture data receiving terminal.

9. The non-transitory computer readable medium of claim 8 , wherein the determining whether the picture quality of the second picture is higher than the pre-set value comprises:
determining whether a picture quality related parameter of the second picture is higher than a threshold value, the picture quality related parameter comprising resolution or brightness.

10. The non-transitory computer readable medium of claim 8 , wherein the method further comprises performing, by the picture data receiving terminal, a corresponding reverse recoding according to data of the second picture received to obtain a third picture.

Assignees

• Guangzhou Ucweb Computer Tech Co Ltd

Inventors

• Chen Binghui

Classifications

• H04N19/172 Primary

  the region being a picture, frame or field · CPC title

• H04N1/41

  Bandwidth or redundancy reduction (by scanning H04N1/17 {; methods or arrangements for coding, decoding, compressing or decompressing digital video signals H04N19/00}) · CPC title

• H04N19/40

  using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream · CPC title

• H04N19/146

  Data rate or code amount at the encoder output · CPC title

• H04N19/12

  Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264 · CPC title