Method for bitrate signaling and bitstream format enabling such method

US10074382B2 · kind B2 · utility

Assignee

• Dolby International AB · IE

Inventors

• Holger Hoerich · Bad Mergentheim, DE
• Alexander Groeschel · Nuremberg, DE
• Jens Popp · Nuremberg, DE
• Marc Roessler · Nuremberg, DE
• Malte Schmidt · Feucht, DE

Key dates

• Filing date: Nov 27, 2014
• Grant date: Sep 11, 2018
• Expiry date: Nov 27, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B2020/10703
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

The present document relates to the determination of a 200 bitrate related to an encoded bitstream, and describes a method for determining an estimate of a bitrate of a bitstream comprising a sequence of frames comprising a varying number of bitsand corresponding to excerpts of an audio and/or video signal. At least two frames of the sequence of frames comprise a parameter indicative of a processing delay for the corresponding frame. The method comprises determining: a total number of bits for a subsequence of frames from the bitstream; a corrected number 201 of frames based on a number of frames comprised within the subsequence and the parameters of at least two frames of the subsequence; and a lower bitrate bound and an upper bitrate bound of the bitrate based on the total number of bits, the corrected number of frames and a frame rate of the bitstream.