符号化中にビットレートおよび解像度を最適化する技術

Japanese Patent JP6706269

B2

In one embodiment of the present invention, an encoding bitrate ladder selector tailors bitrate ladders to the complexity of source data. Upon receiving source data, a complexity analyzer configures an encoder to repeatedly encode the source data-setting a constant quantization parameter to a different value for each encode. The complexity analyzer processes the encoding results to determine an equation that relates a visual quality metric to an encoding bitrate. The bucketing unit solves this equation to estimate a bucketing bitrate at a predetermined value of the visual quality metric. Based on the bucketing bitrate, the bucketing unit assigns the source data to a complexity bucket having an associated, predetermined bitrate ladder. Advantageously, sagaciously selecting the bitrate ladder enables encoding that optimally reflects tradeoffs between quality and resources (e.g., storage and bandwidth) across a variety of source data types instead of a single, “typical” source data type.

JPH09284772	DEVICE AND METHOD FOR COMPRESSING VIDEO DATA
JP2002064789	IMAGE COMPRESSION RECORDING TRANSMITTER AND IMAGE COMPRESSION TRANSMITTER
JP6140099	An encoding method, an encoding device, and an encoding program

Aaron, Anne
Ronca, David
Katsavonidis, Ioannis
Schuler, Andy

JP2017549016A

June 03, 2020

March 10, 2016

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NETFLIX, INC.

H04N19/115; H04N19/14; H04N19/179; H04N19/192

JP9121348A

US20120147958

Fabio Sonnati,Encoding for performance on multiple devices,[online],2011年10月 5日,URL,www.progettosineria.com/flashvideo/finalmax2011.pdf
G. Hervouet et.al.,Video Quality Optimization - Multi-rate Video Encoding,[online],2010年 7月 1日,URL,http://telcogroup.ru/files/materials-pdf/DVB_standards/IPTV/wp_multires_encoding.pdf

Yanagita Seiji
Hideaki Takahashi

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