Receiving device, video recording system and method for reducing video latency in video recording system

A video recording system for reducing video latency, comprising:

• a sending device, comprising a video capture unit for performing a video capturing operation to generate a video;
• a receiving device, comprising a display render unit for performing a video transmission to output the video to a display apparatus connected to the video recording system;
• a communication interface configured to connect the sending device and the receiving device, wherein the video is transmitted through the communication interface to the receiving device;
• a memory at the receiving device, configured to store at least one computer readable instruction;
• and
• a processor at the receiving device, electrically coupled to the memory, and configured to access and execute the at least one computer readable instruction to:
• during the video transmission performed by the display render unit to the display apparatus by using a pixel clock of a first frequency, determine whether a video latency, which is between frame data being ready at the video capture unit to frame data being output to the display apparatus at the display render unit, is necessary to be reduced;
• in response to determining that the video latency is necessary to be reduced, determine a target reduced latency based on a target line count and a current line count;
• and
• determine a first period based on the target reduced latency and a first accelerating scheme at the display render unit or a second accelerating scheme at the video capture unit;
• wherein the display render unit is configured to, in response to that the first period is determined, perform the video transmission to the display apparatus based on the first accelerating scheme for the first period, or the video capture unit is configured to, in response to a request from the receiving device, perform the video capturing operation based on the second accelerating scheme for the first period.

A method for reducing video latency in a video recording system, the video recording system comprising a sending device and a receiving device and the method being utilized in the receiving device, the method comprising:

• during a video transmission performed by the receiving device to a display apparatus by using a pixel clock of a first frequency, determining whether a video latency, which is between frame data being ready at the sending device to frame data being output to the display apparatus at the receiving device, is necessary to be reduced;
• in response to determining that the video latency is necessary to be reduced, determining a target reduced latency based on a target line count and a current line count;
• determining a first period based on the target reduced latency and a first accelerating scheme at the receiving device or a second accelerating scheme at the sending device;
• and
• performing the video transmission to the display apparatus for the first period based on the first accelerating scheme, or requesting the sending device to perform a video capturing operation for the first period based on the second accelerating scheme.