公开(公告)号：US12289457B2

公开(公告)日：2025-04-29

申请号：US18252158

申请日：2020-11-09

Applicant: Google LLC

Inventor： Daniele Moro ,  Claudionor Coelho ,  Sean R. Purser-Haskell ,  Hao Zhuang ,  Stan Vitvitskyy

IPC: H04N19/176 ,  G06T7/11 ,  G06V10/764 ,  G06V30/414 ,  H04N19/154

Abstract: This document describes systems and techniques for encoding a video frame using different compression ratios or compression algorithms for text blocks and non-text blocks. The described systems and techniques can determine, using a machine-learned model, which blocks of a frame include and do not include text. The described systems and techniques can then use a different compression ratio or compression algorithm for text blocks than the compression ratio or compression algorithm used for non-text blocks. For example, the systems and techniques can encode the text blocks using a first compression ratio that results in higher video quality than a second compression ratio used on at least some non-text blocks. In this way, the described systems and techniques can improve text legibility in a video file without significantly increasing the bandwidth requirements to transmit the video file to remote computing devices.

公开(公告)号：US20230412821A1

公开(公告)日：2023-12-21

申请号：US18252158

申请日：2020-11-09

Applicant: Google LLC

Inventor： Daniele Moro ,  Claudionor Coelho ,  Sean R. Purser-Haskell ,  Hao Zhuang ,  Stan Vitvitskyy

IPC: H04N19/176 ,  H04N19/154 ,  G06T7/11 ,  G06V10/764 ,  G06V30/414

CPC classification number: H04N19/176 ,  H04N19/154 ,  G06V30/414 ,  G06V10/764 ,  G06T7/11

Abstract: This document describes systems and techniques for encoding a video frame using different compression ratios or compression algorithms for text blocks and non-text blocks. The described systems and techniques can determine, using a machine-learned model, which blocks of a frame include and do not include text. The described systems and techniques can then use a different compression ratio or compression algorithm for text blocks than the compression ratio or compression algorithm used for non-text blocks. For example, the systems and techniques can encode the text blocks using a first compression ratio that results in higher video quality than a second compression ratio used on at least some non-text blocks. In this way, the described systems and techniques can improve text legibility in a video file without significantly increasing the bandwidth requirements to transmit the video file to remote computing devices.