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draft-hoene-codec-quality-01

draft-hoene-codec-quality-01. IETF #81, Quebec City, Canada hoene@uni-tuebingen.de July 28 th , 2011. Missing Codec Tests (should be done soon). Based on my my previous email (11:22 28.07.2011) Sorted according priority Most important test

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draft-hoene-codec-quality-01

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  1. draft-hoene-codec-quality-01 IETF #81, Quebec City, Canada hoene@uni-tuebingen.de July 28th, 2011

  2. Missing Codec Tests (should be done soon) • Based on my my previous email (11:22 28.07.2011) • Sorted according priority Most important test • two voices at the same time and stereo/binaural voice • Smooth bit rate changes/no artifacts at mode changes • Time stretching and shortening (if this feature is going to be supported) Not important • testing using real packet loss traces • up to 15% loss having acceptable intelligibility • Narrowband: 40 Mhz (2% of a 2 GHz CPU core) • Wideband: 80 Mhz (4% of a 2 GHz CPU core) • SWB/Full: 200 Mhz (10% of a 2 GHz CPU core) • Bit error robustness • Input robustness draft-hoene-codec-quality-01

  3. Codec Characterization(should be done later) Why? • Helps to compare different codec • Gives understanding how to use Opus optimally • Many people would love to see good tests and want to contribute How? • Formally, well-organized, by third parties (no codec developers) When? • Decoupled from codec standardization • Till most tests have been done draft-hoene-codec-quality-01

  4. Some Suggestion on Codec Characterization Action Points • Document shall be edited by some old guys • Objectivity is needed • Editors shall organize formal listening tests • suggest test vectors • avoid some tests are done again and again • Collect and describe formal tests made third party • Including results (Tables) • Change Charter to include Codec Characterization Document draft-hoene-codec-quality-01

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