Intraframe and interframe interlace coding and decoding

US7426308B2 · kind B2 · utility

Assignee

• Microsoft Corporation · US

Inventors

• Pohsiang Hsu · Redmond, US
• Bruce Chih-Lung Lin · Redmond, US
• Thomas W. Holcomb · Bothell, US
• Kunal Mukerjee · Redmond, US
• Sridhar Srinivasan · Bengaluru, IN

Key dates

• Filing date: Jul 18, 2003
• Grant date: Sep 16, 2008
• Expiry date: Apr 14, 2025

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/61
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Techniques and tools for encoding and decoding video images (e.g., interlaced frames) are described. For example, a video encoder or decoder processes 4:1:1 format macroblocks comprising four 8×8 luminance blocks and four 4×8 chrominance blocks. In another aspect, fields in field-coded macroblocks are coded independently of one another (e.g., by sending encoded blocks in field order). Other aspects include DC/AC prediction techniques and motion vector prediction techniques for interlaced frames.