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AOMediaCodec / iamf

Immersive Audio Model and Formats
https://aomediacodec.github.io/iamf/
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To implement new layouts related to 9.1.6ch #834

Closed sunghee-hwang closed 4 months ago

sunghee-hwang commented 5 months ago

Preview | Diff

sunghee-hwang commented 5 months ago

nit: we use both "Center" channel and "Centre" channel in the spec - we should probably just stick to one spelling for consistency.

Let's handle it with the other editorial updates.

sunghee-hwang commented 5 months ago

[Question] How do you feel adding the Top-6ch of 9.1.6ch? As we agreed on having the Top-4ch of 7.1.4ch, it makes sense to have the Top-6ch of 9.1.6ch.

felicialim commented 5 months ago

[Question] How do you feel adding the Top-6ch of 9.1.6ch? As we agreed on having the Top-4ch of 7.1.4ch, it makes sense to have the Top-6ch of 9.1.6ch.

This makes sense.

jingbo-marquis commented 5 months ago

4.3. IA Base-Enhanced Profile They SHALL be able to handle up to 28 channels.

The 28 channels limit applies to the sum of channels across all [Audio Element ]s in a [Mix Presentation ])before mixing.
One example is a mix with 3rd-order Ambisonics (16 channels) + 7.1.4ch (12 channels).

if 9.1.6 layout is added as input layout , the max channels in a mix should be 32 which 16 channel is for 3rd-order Ambisonics and 16 channels are for 9.1.6

sunghee-hwang commented 5 months ago

4.3. IA Base-Enhanced Profile They SHALL be able to handle up to 28 channels.

The 28 channels limit applies to the sum of channels across all [Audio Element ]s in a [Mix Presentation ])before mixing.
One example is a mix with 3rd-order Ambisonics (16 channels) + 7.1.4ch (12 channels).

if 9.1.6 layout is added as input layout , the max channels in a mix should be 32 which 16 channel is for 3rd-order Ambisonics and 16 channels are for 9.1.6

You are right. But as our latest consensus limits the sum of channels up to 28, it does not allow the mix of TOA and 9.1.6ch.