Display mode-based video encoding in wireless display devices

摘要

This disclosure relates to techniques for performing display mode based video encoding to reduce power consumption in a source device of a Wireless Display (WD) system. More specifically, the techniques enable the source device to select an encoding process based on whether the video data to be encoded is in a static display mode or a dynamic display mode. For example, when the video data is in the static display mode, the source device selects a static encoding process that reduces an amount of video data processing and compression, which in turn reduces power consumption at the source device. When the video data is in the dynamic mode, the source device may select a conventional dynamic encoding process. The source device encodes the video data according to the selected encoding process, and transmits the encoded video data to one or more sink devices in the WD system for display.

主权项

1. A method of encoding video data comprising:
processing, with a source device in a Wireless Display (WD) system, video data for display at the source device and display at one or more sink devices in the WD system; determining, with the source device, a display mode of the video data to be encoded based on content information of the video data; when the display mode of the video data is determined to be a dynamic mode based on the content information indicating that the video data includes dynamic content over a period of time, selecting a first encoding process for the video data; when the display mode of the video data is determined to be a static mode based on the content information indicating that the video data includes static content over a period of time, selecting a second encoding process for the video data different from the first encoding process,
wherein the second encoding process reduces an amount of video data processing and compression performed by the source device compared to the first encoding process; adjusting, with the source device, the selected encoding process for the video data based on status information received from the one or more sink devices via an independent channel,
wherein the status information includes at least one of display capability profiles, display related adjustments, or display use status of the sink devices; and encoding the video data according to the selected encoding process for transmission to the one or more sink devices in the WD system,
wherein encoding the video data according to the second encoding process comprises inter-encoding video frames of the video data as skip-mode frames without performing motion estimation; and wherein encoding the video data according to the first encoding process comprises:
intra-encoding one or more video frames of the video data according to video hierarchy values specified by a video coding standard used by the source device and the one or more sink devices,wherein the video hierarchy values-comprise one or more of a group of pictures (GOP) size, a video sequence start position, a picture type, or a slice type for the video data; andinter-encoding other video frames of the video data using motion estimation according to the video coding standard.