Concept for picture/video data streams allowing efficient reducibility or efficient random access

US10958921B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Robert SKUPIN · Berlin, DE
• Yago SÁNCHEZ · Berlin, DE
• Thomas SCHIERL · Berlin, DE
• Cornelius HELLGE · Berlin, DE
• Karsten Grueneberg · Berlin, DE
• Thomas Wiegand · Berlin, DE

Key dates

• Filing date: Aug 30, 2018
• Grant date: Mar 23, 2021
• Expiry date: Nov 10, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/88
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A video data stream is rendered reducible in a manner so that the reduction leads to a restriction of pictures of the reduced video data stream to merely a predetermined subarea of the pictures of the original video data stream and in a manner so that transcoding, such as re-quantization, may be avoided and a conformance of the reduced video data stream relative to the codec underlying the original video data stream be maintained. This is achieved by providing the video data stream with information including an indication of the predetermined subarea and replacement indices for redirecting the indices included by the payload portion so as to refer to, and/or replacement parameters for adjusting the first set of coding parameter settings so as to result in, a second set of coding parameter settings.