Video timing conversion method and device, and computer readable medium

Patent metadata

Field	Value
Publication number	US-11647151-B2
Application number	US-202117614346-A
Country	US
Kind code	B2
Filing date	Jan 13, 2021
Priority date	Jan 17, 2020
Publication date	May 9, 2023
Grant date	May 9, 2023

Abstract

A video timing conversion method and a video timing conversion device, and a non-transitory computer-readable storage medium are provided. The video timing conversion method includes: analyzing an original timing signal in a form of a differential signal of an original video, to obtain original timing parameters; determining target timing parameters and a target clock signal parameter according to a format of a target video and the original timing parameters; wherein the target timing parameters include a data enabling period number, a field sync data valid row number and a refreshing frequency, which are the same as the data enabling period number, the field sync data valid row number and the refreshing frequency of the original timing parameters, respectively; generating a target timing signal in the form of the differential signal of the target video according to the target timing parameters and the target clock signal parameter.

First claim

What is claimed is:

1. A video timing conversion method, comprising steps of:
analyzing an original timing signal in a form of a differential signal of an original video, to obtain original timing parameters, wherein the original timing parameters comprise a data enabling period number, a field sync data valid row number and a refreshing frequency;
determining target timing parameters and a target clock signal parameter according to a format of a target video and the original timing parameters; wherein the target timing parameters comprise a data enabling period number, a field sync data valid row number and a refreshing frequency, which are the same as the data enabling period number, the field sync data valid row number and the refreshing frequency of the original timing parameters, respectively; and
generating a target timing signal in the form of the differential signal of the target video according to the target timing parameters and the target clock signal parameter.

2. The video timing conversion method of claim 1 , further comprising steps of:
analyzing an image signal of the original video to obtain image data; and
synchronizing the image data with the target timing signal to generate the target video.

3. The video timing conversion method of claim 1 , wherein the step of determining target timing parameters according to a format of a target video and the original timing parameters comprises steps of:
determining the data enabling period number, the field sync data valid row number and the refreshing frequency of the target timing parameters, which have the same values as the data enabling period number, the field sync data valid row number and the refreshing frequency of the original timing parameters, respectively; and
searching for target timing additional parameters corresponding to the data enabling period number, the field sync data valid row number and the refreshing frequency of the target timing parameters, according to a preset correspondence in the format of the target video.

4. The video timing conversion method of claim 3 , wherein the target timing additional parameters comprises:
a row sync total period number, a row sync signal period number, a row sync front shoulder period number, a row sync back shoulder period number, a field sync total row number, a field sync signal period number, a field sync front shoulder row number, and a field sync back shoulder row number.

5. The video timing conversion method of claim 4 , wherein the step of determining a target clock signal parameter according to a format of a target video and the original timing parameters comprises:
determining a frequency of the target clock signal, which is equal to the row sync total period number×the field sync total row number×the refreshing frequency.

6. The video timing conversion method of claim 1 , wherein
the original timing signal is in a form of a low voltage differential signal; and
the target timing signal is in the form of the low voltage differential signal.

7. The video timing conversion method of claim 6 , wherein
the original timing signal comprises an original row sync signal, an original field sync signal, and an original data enabling signal; and
the target timing signal comprises a target row sync signal, a target field sync signal, and a target data enabling signal.

8. The video timing conversion method of claim 7 , wherein the step of generating a target timing signal in the form of the differential signal of the target video according to the target timing parameters and the target clock signal parameter comprises steps of:
generating the target clock signal according to the target clock signal parameter;
counting a pulse period of the target clock signal to obtain a counting result; and
generating the target timing signal according to the target timing parameters and the counting result.

9. The video timing conversion method of claim 8 , wherein the target timing parameters further comprises target timing additional parameters, the target timing additional parameters comprising: a row sync total period number, a row sync signal period number, a row sync front shoulder period number, a row sync back shoulder period number, a field sync total row number, a field sync signal period number, a field sync front shoulder row number, and a field sync back shoulder row number;
the step of counting a pulse period of the target clock signal to obtain a counting result comprises steps of:
setting a current row number to be 1;
setting a current row period number to be 1;
every time counting one pulse period of the target clock signal, adding 1 to the current row period number;
when the current row period number reaches the row sync total period number, adding 1 to the current row number, and returning to the step of setting the current row period number to be 1;
when the current row number reaches the field sync total row number, returning to the step of setting the current row number to be 1.

10. The video timing conversion method of claim 9 , wherein the step of generating a target timing signal according to the target timing parameters and the counting result comprises steps of:
when the current row period number reaches the row sync total period number, outputting a valid row sync signal until the current row period number reaches the row sync signal period number;
when the current row number reaches the field sync total row number, outputting a valid field sync signal until the current row period number reaches the field sync signal period number;
when the current row number reaches a sum of the field sync back shoulder row number and the field sync signal period number, starting an output stage until the current row number reaches a sum of the field sync signal period number, the field sync back shoulder row number and the field sync data valid row number; in the output stage, when the current row period number reaches a sum of the row sync signal period number and the row sync back shoulder period number, outputting a valid data enabling signal until the current row period number reaches a sum of the row sync signal period number, the row sync back shoulder period number and the data enabling period number.

11. A non-transitory computer-readable storage medium having stored thereon computer-executable instructions, wherein the instructions, when executed by a processor, perform the video timing conversion method of claim 1 .

12. The non-transitory computer-readable storage medium of claim 11 , wherein the video timing conversion method further comprises steps of:
analyzing an image signal of the original video to obtain image data; and
synchronizing the image data with the target timing signal to generate the target video.

13. The non-transitory computer-readable storage medium of claim 11 , wherein the step of determining target timing parameters according to a format of a target video and the original timing parameters comprises steps of:
determining the data enabling period number, the field sync data valid row number and the refreshing frequency of the target timing parameters, which have the same values as the data enabling period number, the field sync data valid row number and the refreshing frequency of the original timing parameters, respectively; and
searching for target timing additional parameters corresponding to the data enabling period number, the field sync data valid row number and the refreshing frequency of the target timing parameters, according to a preset correspondence in the format of the target video.

14. The non-transitory computer-readable storage medium of clai

Assignees

• Boe Technology Group Co Ltd

Inventors

• Wu Congrui
• Geng Lihua
• Ma Xitong
• Li Yanfu
• Rao Tianmin

Classifications

• H04N7/01 Primary

  Conversion of standards {, e.g. involving analogue television standards or digital television standards processed at pixel level} · CPC title

• G09G5/12

  Synchronisation between the display unit and other units, e.g. other display units, video-disc players · CPC title

• G09G2340/0435

  Change or adaptation of the frame rate of the video stream · CPC title

• G09G2370/14

  Use of low voltage differential signaling [LVDS] for display data communication · CPC title

• H04N5/04 Primary

  Synchronising (for television systems using pulse code modulation H04N7/56) · CPC title