Comments (2)
We can update the spec to match what the current reference software does with zero-order Ambisonics (treat it as stereo).
from iamf.
We can update the spec to match what the current reference software does with zero-order Ambisonics (treat it as stereo).
I tested this implementation https://github.com/ebu/ebu_adm_renderer and it can handle and render zero order ambisonics
It handles zero order ambisonics as HOA (which is technically not correct but it does the same case with first order)
``
<audioChannelFormat audioChannelFormatID="AC_00041001" audioChannelFormatName="channel_1" typeLabel="0004"
typeDefinition="HOA">
<audioBlockFormat audioBlockFormatID="AB_00041001_00000001">
<order>0</order>
<degree>0</degree>
<normalization>SN3D</normalization>
<screenRef>0</screenRef>
</audioBlockFormat>
</audioChannelFormat>
``
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Related Issues (20)
- Selection of layout to use for pass-through rendering is ambiguous HOT 1
- Profile limitations with mixed-order ambisonics are ambiguous HOT 2
- Correct a typo on static 3.1.2ch down-mix matrix for 7.1.4ch of section 7.6.2
- Delete Recon_Gain_Flags.png (no more used) in images folder
- Clarify `leb128` padding limit HOT 1
- Suggestion to consider changing leb128 in IACB atom to a fixed 4-byte value HOT 6
- Update Profile section to add Base-Enhanced profile as one of v1.1 features
- Implement CENC as one of v1.1 features
- Implement signaling of expanded loudspeaker layout as one of v1.1 features
- Need to clarify how to declare the language code of IA Track with multiple languages HOT 1
- Consider adding an use case for multi-language service in the Section 1 Introduction
- The 4-bit values of loudspeaker_layout are written incorrectly.
- The spec uses both "Center" channel and "Centre" channel.
- The key words for conformance are misused. (UPPERCASES <-> lowercases)
- Recommend to change "Reserved" to "Reserved for future use"
- Need to clarify if PARAMETER_DEFINITION_DEMIXING is necessary for expanded layouts.
- The sentence about the additional profile in the base-enhanced profile needs to move up from the bullet point to a new paragraph.
- (Typo) defintion to definition
- Describe explicit that output_gain_is_present_flag and recon_gain_is_present_flag are set to 0 for num_layers = 1
- "num_layers" in the note of section 10.1.3 (informative) needs to be fixed to "num_layouts".
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from iamf.