Method and apparatus for encoding and/or decoding video data using adaptive prediction order for spatial and bit depth prediction

US8270468B2 · kind B2 · utility

Assignee

• Thomson Licensing · FR

Inventors

• Ingo Tobias Doser · Donaueschingen, DE
• Yu Wen Wu · Beijing, CN
• Yong Ying Gao · Beijing, CN

Key dates

• Filing date: Nov 27, 2007
• Grant date: Sep 18, 2012
• Expiry date: Apr 21, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/46
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A scalable video bitstream may have an H.264/AVC compatible base layer (BL) and a scalable enhancement layer (EL), where scalability refers to color bit depth. The H.264/AVC scalability extension SVC provides also other types of scalability, e.g. spatial scalability where the number of pixels in BL and EL are different. According to the invention, BL information is upsampled (TUp,BDUp) in two logical steps in adaptive order, one being texture upsampling and the other being bit depth upsampling. Texture upsampling is a process that increases the number of pixels, and bit depth upsampling is a process that increases the number of values that each pixel can have, corresponding to the pixels color intensity. The upsampled BL data are used to predict the collocated EL. A prediction order indication is transferred so that the decoder can upsample BL information in the same manner as the encoder, wherein the upsampling refers to spatial and bit depth characteristics.