Dual-layer backwards-compatible progressive video delivery

摘要

Given an input progressive sequence, a video encoder creates a dual-layer stream that combines a backwards-compatible interlaced video stream layer with an enhancement layer to reconstruct full-resolution progressive video. Given two consecutive frames in the input progressive sequence, vertical processing generates a top field-bottom field (TFBF) frame in a base layer (BL) TFBF sequence, and horizontal processing generates a side-by-side (SBS) frame in an enhancement layer (EL) SBS video sequence. The BL TFBF and the EL SBS sequences are compressed together to create a coded, backwards compatible output stream.

主权项

1. A method in an encoder comprising:
accessing an input progressive video sequence; performing vertical processing on at least two consecutive frames of the input progressive video sequence to construct a baseline layer (BL) interlaced top field-bottom field (TFBF) frame in a BL TFBF video sequence; performing horizontal processing on the at least two consecutive frames of the input progressive video sequence to construct an enhancement layer (EL) side-by-side (SBS) frame in an EL SBS video sequence; wherein the EL SBS frame has a higher vertical spatial resolution than the BL TFBF frame; and compressing the BL TFBF sequence and the EL SBS sequence to create a coded, backwards compatible output stream.