Signaling of state information for a decoded picture buffer and reference picture lists

US10003817B2 · kind B2 · utility

Assignee

• MICROSOFT TECHNOLOGY LICENSING, LLC · US

Inventors

• Gary J. Sullivan · Bellevue, US
• Yongjun Wu · Redmond, US

Key dates

• Filing date: Nov 5, 2012
• Grant date: Jun 19, 2018
• Expiry date: Oct 6, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/70
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Innovations for signaling state of a decoded picture buffer (“DPB”) and reference picture lists (“RPLs”). In example implementations, rather than rely on internal state of a decoder to manage and update DPB and RPLs, state information about the DPB and RPLs is explicitly signaled. This permits a decoder to determine which pictures are expected to be available for reference from the signaled state information. For example, an encoder determines state information that identifies which pictures are available for use as reference pictures (optionally considering feedback information from a decoder about which pictures are available). The encoder sets syntax elements that represent the state information. In doing so, the encoder sets identifying information for a long-term reference picture (“LTRP”), where the identifying information is a value of picture order count least significant bits for the LTRB. The encoder then outputs the syntax elements as part of a bitstream.