Tech-invite 3GPPspace IETFspace

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Content for TR 26.950 Word version: 17.0.0

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2 References p. 5

3 Definitions and abbreviations p. 6

3.1 Definitions p. 6

3.2 Abbreviations p. 6

4 Use cases p. 6

4.1 Surround sound over headphones p. 7

4.2 Surround sound over loudspeakers p. 8

4.2.1 Decoding and rendering on a UE p. 8

4.2.2 Decoding and rendering on a non-3GPP device connected to a UE p. 8

4.2.3 Decoding on a UE and rendering on a non-3GPP device connected to a UE p. 9

4.2.4 PSS/MBMS delivery methods p. 9

5 Design constraints p. 9

5.1 Mono/Stereo Backwards compatibility p. 10

5.2 Number of audio channels p. 10

5.2.1 Number of audio input channels p. 10

5.2.2 Number of audio output channels p. 10

5.3 Sampling frequency p. 10

5.4 Bit rates p. 11

5.5 Computational complexity p. 11

5.6 Other design constraints p. 11

6 Test item selection criteria p. 11

7 Performance requirements p. 12

7.1 General requirements p. 12

7.2 Loudspeaker requirements p. 12

7.3 Binaural test p. 13

7.4 Backward compatibility test p. 13

7.5 Error test p. 13

7.6 Listening test on HRTF p. 13

8 Validation of the user benefits and feasibility through evaluation of at least one example of surround sound p. 13

8.1 Listening test over loudspeakers p. 13

8.2 Listening test over headphones p. 15

8.3 Backward compatibility p. 18

8.4 Test under errors conditions p. 19

8.4.1 Results with interleaver p. 19

8.4.2 Results without interleaver p. 21

8.5 Test on HRTFs p. 23

9 Conclusion p. 24

A Test plans and global analysis reports p. 25

$ Change history p. 26