Low latency visually lossless switching between different compression ratios

摘要

Systems and methods for low-delay video streaming featuring multiple video compression ratios. One embodiment of the system includes: a real-time video encoder (RT-VE) that receives an incoming high-definition uncompressed video (HD-UV), processes the incoming HD-UV according to first and second compression ratios, and sends the processed video over a resource reservation communication link to a real-time video decoder (RT-VD). The compression delay added by the RT-VE is below the duration of a single video frame, and the RT-VD converts the processed video into an outgoing HD-UV. Wherein on-the-fly switches between the first and second compression ratios, while continuing to receive the incoming HD-UV uninterruptedly, are both visually lossless switches and maintain a total delay between corresponding frames of the incoming HD-UV and the outgoing HD-UV that is below duration of two video frames.

主权项

1. A low-delay video streaming system comprising multiple video compression ratios, comprising:
a real-time video encoder (RT-VE) configured to receive an incoming high-definition uncompressed video (HD-UV), process the incoming HD-UV according to at least one of first and second compression ratios, and send the processed video over a resource reservation communication link to a real-time video decoder (RT-VD); wherein the first compression ratio is up to 5:1 and the second compression ratio is both deeper than the first compression ratio and up to 10:1; wherein compression delay added by the RT-VE is below duration of a single video frame for both compression ratios; and the RT-VD is configured to convert the processed video into an outgoing HD-UV; wherein on-the-fly switches between the first and second compression ratios, while continuing to receive the incoming HD-UV uninterruptedly, are both visually lossless switches and maintain a total delay between corresponding frames of the incoming HD-UV and the outgoing HD-UV that is below duration of two video frames.