TR 26.912
Codec for Circuit switched Multimedia Telephony Service;
Quantitative performance evaluation of H.324 Annex C over 3G
V4.0.0 (PDF)
2001/04 40 p.
V3.0.0
2000/03 39 p.
- Rapporteur:
- Dr. Jung, Kyunghun
full Table of Contents for TR 26.912 Word version: 4.0.0
1 Scope p. 6
The present document is meant to function as guidance in the work of other 3GPP work groups or work items. Such work may include conclusion on how to achieve detailed Stage 1 service requirements or suggestion of a set of recommended RAB parameters giving satisfactory user-to-user quality for a circuit switched multimedia service using 3G-324M.
2 References p. 6
3 Definitions and abbreviations p. 6
3.1 Definitions p. 6
3.2 Abbreviations p. 7
4 3GPP Configuration of H.324 annex C p. 8
5 Performance p. 9
5.1 Audio p. 9
5.1.1 Introduction p. 9
5.1.2 Results p. 9
5.2 Video p. 11
5.2.1 Introduction p. 11
5.2.2 Test environment p. 11
5.2.3 Results p. 12
5.2.3.1 Subjective results p. 12
5.2.3.2 Objective results p. 14
A Quality degradation as a function of the FER and RBER in presence of background noise p. 17
B Simulation test of a video multimedia codec p. 20
B.1 Introduction p. 20
B.2 Test Procedure p. 21
B.2.1 Simulation Model p. 21
B.2.2 Source materials p. 22
B.2.3 Source encoding p. 22
B.2.3.1 Speech p. 22
B.2.3.2 Video p. 23
B.2.4 Multiplexing p. 23
B.2.5 Bit error injection p. 23
B.2.5.1 Error pattern files p. 23
B.2.5.2 Error pattern segments to be used at the simulation p. 24
B.2.5.3 Injection of bit errors p. 25
B.2.6 De-multiplexing p. 25
B.2.7 Video decoding p. 25
B.2.8 Constraints and regulations p. 25
B.2.8.1 Delay p. 25
B.2.8.1.1 Video p. 26
B.2.9 Statistical data to be reported p. 26
B.2.9.1 Video coding bitrate [%6,2f kbps] and MUX overhead [%6,2f kbps] p. 26
B.2.9.2 Speech coding bitrate [%6,2f kbps] and frame length [%d ms] p. 26
B.2.9.3 Video initial delay [%6,1f ms] p. 26
B.2.9.4 PSNR related data p. 26
B.2.9.4.1 Total average PSNR, i.e., PSNRtotal [%6.2f dB] p. 26
B.2.9.4.2 Average PSNR for representative run, i.e., PSNRk* [%6.2f dB] p. 26
B.2.9.4.3 Average PSNR in error-free case, i.e., PSNRfree [%6.2f dB] p. 27
B.2.9.4.4 Standard deviation of PSNR, i.e., Sigma [%6.2f dB] p. 27
B.2.9.5 Coding frame rate [%5.2f frames/sec] p. 27
B.2.9.6 Average dropframe rate [%6.2f %] p. 27
B.2.9.7 Out of delay constraints rate [%6.2f %] p. 27
B.2.9.8 Definition of video stationary delay p. 27
B.2.9.9 Decoded video of representative run p. 28
B.3 Subjective quality evaluation p. 28
B.3.1 Structure of test p. 28
B.3.1.1 Program p. 28
B.3.1.2 Training session p. 28
B.3.1.3 Scoring session p. 28
B.3.1.4 Video sequence p. 28
B.3.1.5 Structure of program p. 29
B.3.2 Editing process p. 29
B.3.3 Assessment p. 29
B.3.3.1 Test subjects p. 29
B.3.3.2 Facilities and equipment for test p. 30
B.3.3.3 Score sheet p. 30
B.3.4 Data processing p. 30
B.4 Test results and observations p. 31
B.4.1 Test results p. 31
B.4.2 Observations p. 31
B.5 List of video/speech codecs and multiplexers employed in the simulation p. 32
B.6 Test results p. 33
$ Change history p. 38
