Method, device and system for transmitting and receiving pictures using a hybrid resolution encoding framework

Patent metadata

Field	Value
Publication number	US-10869048-B2
Application number	US-201916546034-A
Country	US
Kind code	B2
Filing date	Aug 20, 2019
Priority date	Jun 28, 2017
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

Embodiments of this application disclose a picture transmission method performed at a computer device. After obtaining a picture, the computer device generates a video sequence by replicating the picture N times, and N being a positive integer. Next the computer device obtains a resolution setting sequence and encodes the N to-be-encoded pictures in the video sequence according to the resolution setting sequence to generate N encoded pictures, each encoded picture having an associated resolution setting. Finally, the computer device sends the N encoded pictures to a decoding computer device. The decoding computer device then decodes and displays the N encoded pictures according to their respective resolution settings from low to high.

First claim

What is claimed is:

1. A picture transmission method, applied to a computer device having one or more processors and memory storing programs to be executed by the one or more processors and the method comprising the following steps:
obtaining a picture;
generating a video sequence according to the picture, the video sequence comprising N to-be-encoded pictures generated by replicating the picture N times, and N being a positive integer;
obtaining a resolution setting sequence, the resolution setting sequence comprising resolutions corresponding to the N to-be-encoded pictures;
obtaining a quantization parameter corresponding to each of the N to-be-encoded pictures, quantization parameters corresponding to the first to M th to-be-encoded pictures gradually decreasing, and quantization parameters corresponding to the (M+1) th to N th to-be-encoded pictures gradually decreasing; and
encoding the N to-be-encoded pictures in the video sequence according to the resolution setting sequence and the quantization parameters corresponding to the N to-be-encoded pictures to generate N encoded pictures, each encoded picture having an associated resolution setting and quantization parameter, and sending the N encoded pictures to a decoding computer device,
wherein the decoding computer device decodes and displays the N encoded pictures according to their respective resolution settings from low to high and corresponding quantization parameters.

2. The picture transmission method according to claim 1 , wherein first to M th to-be-encoded pictures in the N to-be-encoded pictures correspond to downsampling resolutions, and (M+1) th to N th to-be-encoded pictures in the N to-be-encoded pictures correspond to full sampling resolutions, M being a positive integer less than N.

3. The picture transmission method according to claim 1 , wherein a difference between the quantization parameter of the (M+1) th to-be-encoded picture and a preset quantization parameter threshold is less than the quantization parameter of the M th to-be-encoded picture.

4. The picture transmission method according to claim 1 , wherein the encoding the N to-be-encoded pictures in the video sequence according to the resolution setting sequence to generate N encoded pictures comprises:
encoding an i th to-be-encoded picture to generate an i th encoded picture using intra-frame encoding; and
using the i th encoded picture as an i th reference picture to encode an (i+1) th to-be-encoded picture to generate an (i+1) th encoded picture using inter-frame encoding, i being a positive integer less than N.

5. The picture transmission method according to claim 1 , further comprising:
obtaining data volume information of the picture;
generating corresponding bit rate limit information according to the data volume information of the picture; and
the encoding the N to-be-encoded pictures in the video sequence according to the resolution setting sequence to generate N encoded pictures comprises:
encoding the N to-be-encoded pictures in the video sequence according to the resolution setting sequence and the bit rate limit information to generate the N encoded pictures.

6. A computer device comprising one or more processors, memory coupled to the one or more processors and a plurality of programs stored in the memory that, when executed by the one or more processors, cause the computer device to perform a plurality of operations comprising:
obtaining a picture;
generating a video sequence according to the picture, the video sequence comprising N to-be-encoded pictures generated by replicating the picture N times, and N being a positive integer;
obtaining a resolution setting sequence, the resolution setting sequence comprising resolutions corresponding to the N to-be-encoded pictures;
obtaining a quantization parameter corresponding to each of the N to-be-encoded pictures, quantization parameters corresponding to the first to M th to-be-encoded pictures gradually decreasing, and quantization parameters corresponding to the (M+1) th to N th to-be-encoded pictures gradually decreasing; and
encoding the N to-be-encoded pictures in the video sequence according to the resolution setting sequence and the quantization parameters corresponding to the N to-be-encoded pictures to generate N encoded pictures, each encoded picture having an associated resolution setting and quantization parameter, and sending the N encoded pictures to a decoding computer device,
wherein the decoding computer device decodes and displays the N encoded pictures according to their respective resolution settings from low to high and corresponding quantization parameters.

7. The computer device according to claim 6 , wherein first to M th to-be-encoded pictures in the N to-be-encoded pictures correspond to downsampling resolutions, and (M+1) th to N th to-be-encoded pictures in the N to-be-encoded pictures correspond to full sampling resolutions, M being a positive integer less than N.

8. The computer device according to claim 6 , wherein a difference between the quantization parameter of the (M+1) th to-be-encoded picture and a preset quantization parameter threshold is less than the quantization parameter of the M th to-be-encoded picture.

9. The computer device according to claim 6 , wherein the encoding the N to-be-encoded pictures in the video sequence according to the resolution setting sequence to generate N encoded pictures comprises:
encoding an i th to-be-encoded picture to generate an i th encoded picture using intra-frame encoding; and
using the i th encoded picture as an i th reference picture to encode an (i+1) th to-be-encoded picture to generate an (i+1) th encoded picture using inter-frame encoding, i being a positive integer less than N.

10. The computer device according to claim 6 , wherein the plurality of operations further comprise:
obtaining data volume information of the picture;
generating corresponding bit rate limit information according to the data volume information of the picture; and
the encoding the N to-be-encoded pictures in the video sequence according to the resolution setting sequence to generate N encoded pictures comprises:
encoding the N to-be-encoded pictures in the video sequence according to the resolution setting sequence and the bit rate limit information to generate the N encoded pictures.

11. A non-transitory computer readable storage medium storing a plurality of machine readable instructions in connection with a computer device having one or more processors, wherein the plurality of machine readable instructions, when executed by the one or more processors, cause the computer device to perform a plurality of operations including:
obtaining a picture;
generating a video sequence according to the picture, the video sequence comprising N to-be-encoded pictures generated by replicating the picture N times, and N being a positive integer;
obtaining a resolution setting sequence, the resolution setting sequence comprising resolutions corresponding to the N to-be-encoded pictures;
obtaining a quantization parameter corresponding to each of the N to-be-encoded pictures, quantization parameters corresponding to the first to M th to-be-encoded pictures gradually decreasing, and quantization parameters corresponding to the (M+1) th to N th to-be-encoded pictures gradually decreasing; and
encoding the N to-be-encoded pictures in the video sequence according to the resolution setting sequence and the quantization parameters corresponding to the N to-be-encoded pictures to generate N encoded pictures, each encoded picture having an associated resolution setting and quantization parameter, and sending th

Assignees

• Tencent Tech Shenzhen Co Ltd

Inventors

• Mao Xunan
• Gao Xinwei
• Zhang Tao
• Guo Licai
• Shi Yongfang
• Gao Anlin
• Deng Haibo
• Guo Yaoyao
• Gu Chenchen
• He Jian
• Lv Jing

Classifications

• H04N19/172

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

• H04N19/33

  in the spatial domain · CPC title

• H04N19/34 Primary

  Scalability techniques involving progressive bit-plane based encoding of the enhancement layer, e.g. fine granular scalability [FGS] · CPC title

• H04N19/61

  in combination with predictive coding · CPC title

• H04N19/395

  involving distributed video coding [DVC], e.g. Wyner-Ziv video coding or Slepian-Wolf video coding · CPC title