Fast HEVC screen content coding by skipping unnecessary checking of intra block copy mode based on CU activity and gradient

Sik Ho Tsang; Wei Kuang; Yui Lam Chan; Wan Chi Siu

doi:10.1109/APSIPA.2016.7820900

Fast HEVC screen content coding by skipping unnecessary checking of intra block copy mode based on CU activity and gradient

Sik Ho Tsang
, Wei Kuang
, Yui Lam Chan
, Wan Chi Siu

The Hong Kong Polytechnic University

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

25 Citations (Scopus)

Abstract

The Intra Block Copy (IntraBC) mode is a very efficient coding tool for the screen content coding (SCC) extension in High Efficiency Video Coding (HEVC) by finding the repeating patterns within the same frame. Yet, it also brings along impractically high computational complexity for SCC, which can be a double of the conventional HEVC, as exhaustive block matching is done within the same frame even though there are already some constraints applied to the IntraBC mode. To reduce the complexity, we propose to skip the unnecessary IntraBC mode checking based on the activity and gradient within the coding unit (CU). With our proposed methods, the increased encoding time compared with the conventional HEVC is reduced from 90.0% to 62.2% on average while the coding efficiency can still be maintained with only negligible bitrate increased.

Original language	English
Title of host publication	2016 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA 2016
Publisher	IEEE
ISBN (Electronic)	9789881476821
DOIs	https://doi.org/10.1109/APSIPA.2016.7820900
Publication status	Published - 17 Jan 2017
Event	2016 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA 2016 - Jeju, Korea, Republic of Duration: 13 Dec 2016 → 16 Dec 2016

Conference

Conference	2016 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA 2016
Country/Territory	Korea, Republic of
City	Jeju
Period	13/12/16 → 16/12/16

ASJC Scopus subject areas

Artificial Intelligence
Computer Science Applications
Information Systems
Signal Processing

More information

10.1109/APSIPA.2016.7820900

Cite this

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title = "Fast HEVC screen content coding by skipping unnecessary checking of intra block copy mode based on CU activity and gradient",

abstract = "The Intra Block Copy (IntraBC) mode is a very efficient coding tool for the screen content coding (SCC) extension in High Efficiency Video Coding (HEVC) by finding the repeating patterns within the same frame. Yet, it also brings along impractically high computational complexity for SCC, which can be a double of the conventional HEVC, as exhaustive block matching is done within the same frame even though there are already some constraints applied to the IntraBC mode. To reduce the complexity, we propose to skip the unnecessary IntraBC mode checking based on the activity and gradient within the coding unit (CU). With our proposed methods, the increased encoding time compared with the conventional HEVC is reduced from 90.0\% to 62.2\% on average while the coding efficiency can still be maintained with only negligible bitrate increased.",

author = "Tsang, \{Sik Ho\} and Wei Kuang and Chan, \{Yui Lam\} and Siu, \{Wan Chi\}",

year = "2017",

month = jan,

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doi = "10.1109/APSIPA.2016.7820900",

language = "English",

booktitle = "2016 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA 2016",

publisher = "IEEE",

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note = "2016 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA 2016 ; Conference date: 13-12-2016 Through 16-12-2016",

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Tsang, SH, Kuang, W, Chan, YL & Siu, WC 2017, Fast HEVC screen content coding by skipping unnecessary checking of intra block copy mode based on CU activity and gradient. in 2016 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA 2016., 7820900, IEEE, 2016 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA 2016, Jeju, Korea, Republic of, 13/12/16. https://doi.org/10.1109/APSIPA.2016.7820900

Fast HEVC screen content coding by skipping unnecessary checking of intra block copy mode based on CU activity and gradient. / Tsang, Sik Ho; Kuang, Wei; Chan, Yui Lam et al.
2016 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA 2016. IEEE, 2017. 7820900.

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

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T1 - Fast HEVC screen content coding by skipping unnecessary checking of intra block copy mode based on CU activity and gradient

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AU - Siu, Wan Chi

PY - 2017/1/17

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N2 - The Intra Block Copy (IntraBC) mode is a very efficient coding tool for the screen content coding (SCC) extension in High Efficiency Video Coding (HEVC) by finding the repeating patterns within the same frame. Yet, it also brings along impractically high computational complexity for SCC, which can be a double of the conventional HEVC, as exhaustive block matching is done within the same frame even though there are already some constraints applied to the IntraBC mode. To reduce the complexity, we propose to skip the unnecessary IntraBC mode checking based on the activity and gradient within the coding unit (CU). With our proposed methods, the increased encoding time compared with the conventional HEVC is reduced from 90.0% to 62.2% on average while the coding efficiency can still be maintained with only negligible bitrate increased.

AB - The Intra Block Copy (IntraBC) mode is a very efficient coding tool for the screen content coding (SCC) extension in High Efficiency Video Coding (HEVC) by finding the repeating patterns within the same frame. Yet, it also brings along impractically high computational complexity for SCC, which can be a double of the conventional HEVC, as exhaustive block matching is done within the same frame even though there are already some constraints applied to the IntraBC mode. To reduce the complexity, we propose to skip the unnecessary IntraBC mode checking based on the activity and gradient within the coding unit (CU). With our proposed methods, the increased encoding time compared with the conventional HEVC is reduced from 90.0% to 62.2% on average while the coding efficiency can still be maintained with only negligible bitrate increased.

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Fast HEVC screen content coding by skipping unnecessary checking of intra block copy mode based on CU activity and gradient

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