Publication result detail

Subjective Quality Assessment of the Impact of Buffer Size in Fine-Grain Parallel Video Encoding

MONTERO, P.; POLÁK, L.; TAIBO, J.; KRATOCHVÍL, T.

Original Title

Subjective Quality Assessment of the Impact of Buffer Size in Fine-Grain Parallel Video Encoding

English Title

Subjective Quality Assessment of the Impact of Buffer Size in Fine-Grain Parallel Video Encoding

Type

WoS Article

Original Abstract

Fine-Grain parallelism is essential for real-time video encoding performance. This usually implies setting a fixed buffer size for each encoded block. The choice of this parameter is critical for both performance and hardware cost. In this paper we analyze the impact of buffer size on image subjective quality, and its relation with other encoding parameters. We explore the consequences on visual quality, when minimizing buffer size to the point of causing the discard of quantized coefficients for highest frequencies. Finally, we propose some guidelines for the choice of buffer size, that has proven to be heavily dependent, in addition to other parameters, on the type of sequence being encoded. These guidelines are useful for the design of efficient realtime encoders, both hardware and software.

English abstract

Fine-Grain parallelism is essential for real-time video encoding performance. This usually implies setting a fixed buffer size for each encoded block. The choice of this parameter is critical for both performance and hardware cost. In this paper we analyze the impact of buffer size on image subjective quality, and its relation with other encoding parameters. We explore the consequences on visual quality, when minimizing buffer size to the point of causing the discard of quantized coefficients for highest frequencies. Finally, we propose some guidelines for the choice of buffer size, that has proven to be heavily dependent, in addition to other parameters, on the type of sequence being encoded. These guidelines are useful for the design of efficient realtime encoders, both hardware and software.

Keywords

Parallel MPEG-2, ITU-R BT.500, subjective test, video quality, ACR, MOS, PSNR

Key words in English

Parallel MPEG-2, ITU-R BT.500, subjective test, video quality, ACR, MOS, PSNR

Authors

MONTERO, P.; POLÁK, L.; TAIBO, J.; KRATOCHVÍL, T.

RIV year

2013

Released

07.12.2012

Location

Brno

ISBN

1210-2512

Periodical

Radioengineering

Volume

21

Number

4

State

Czech Republic

Pages from

1226

Pages to

1235

Pages count

10

BibTex

@article{BUT94962,
  author="Pablo {Montero} and Ladislav {Polák} and Javier {Taibo} and Tomáš {Kratochvíl}",
  title="Subjective Quality Assessment of the Impact of Buffer Size in Fine-Grain Parallel Video Encoding",
  journal="Radioengineering",
  year="2012",
  volume="21",
  number="4",
  pages="1226--1235",
  issn="1210-2512"
}