Publication

Video quality evaluation for mobile applications

Stefan Winkler
2003
Conference Papers

Résumé

This paper presents the results of our quality evaluations of video sequences encoded for and transmitted over a wireless channel. We selected content, codecs, bitrates and bit error patterns representative of mobile applications and we concentrated on the MPEG-4 and Motion JPEG2000 coding standards. We carried out subjective experiments using the Single Stimulus Continuous Quality Evaluation (SSCQE) method on this test material. We analyze the results of the subjective data and use them to compare codec performance and resilience to transmission errors. Finally, we use the subjective data to validate the prediction performance of a real-time non-reference quality metric.

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https://infoscience.epfl.ch/entities/publication/d55e3cb1-c5f4-499f-b4db-e55cc996cdff

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Stefan Winkler
2003
Conference Papers

Résumé

Source officielle

https://infoscience.epfl.ch/entities/publication/d55e3cb1-c5f4-499f-b4db-e55cc996cdff

À propos de ce résultat

Concepts associés (32)

Video quality

Video quality is a characteristic of a video passed through a video transmission or processing system that describes perceived video degradation (typically, compared to the original video). Video processing systems may introduce some amount of distortion or artifacts in the video signal that negatively impacts the user's perception of a system. For many stakeholders in video production and distribution, assurance of video quality is an important task. Video quality evaluation is performed to describe the quality of a set of video sequences under study.

Comparison of video codecs

Α video codec is software or a device that provides encoding and decoding for digital video, and which may or may not include the use of video compression and/or decompression. Most codecs are typically implementations of video coding formats. The compression may employ lossy data compression, so that quality-measurement issues become important. Shortly after the compact disc became widely available as a digital-format replacement for analog audio, it became feasible to also store and use video in digital form.

Video coding format

A video coding format (or sometimes video compression format) is a content representation format for storage or transmission of digital video content (such as in a data file or bitstream). It typically uses a standardized video compression algorithm, most commonly based on discrete cosine transform (DCT) coding and motion compensation. A specific software, firmware, or hardware implementation capable of compression or decompression to/from a specific video coding format is called a video codec.

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Video quality evaluation for mobile applications

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