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fix: preparation typo fixes for ISOBMFF binding text #125

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Jul 18, 2025
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fix: preparation typo fixes for ISOBMFF binding text #125

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fix: preparation typo fixes for ISOBMFF binding text
bradh Jul 17, 2025
90b38de
Update readme/apv_isobmff.md
bradh Jul 17, 2025
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16 changes: 8 additions & 8 deletions readme/apv_isobmff.md
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@@ -1,5 +1,5 @@
ISOBMFF binding for APV
==============
=======================

# Introduction

Expand Down Expand Up @@ -53,7 +53,7 @@ The compressorname field of the VisualSampleEntry shall have '\012APV Coding'. T

### Description

The box with APVCodecConfigurationBox shall contains APVDecoderConfigurationRecord as defined in {{APVDecoderConfigurationRecord}}
The box with APVCodecConfigurationBox shall contain an APVDecoderConfigurationRecord as defined in {{APVDecoderConfigurationRecord}}

### Syntax

Expand Down Expand Up @@ -111,7 +111,7 @@ aligned(8) class APVDecoderConfigurationRecord {
> indicates the value of the pbu_type field in the pbu header immediately preceding the frame data for a certain index i.

+ number_of_frame_info[i]
> indicates the number of variations of the frame header information for the frames whose value of the pbu_type field in the pbu header immediately preceding it is idendtical with the value of the pub_type[i] field for a certain index i.
> indicates the number of variations of the frame header information for the frames whose value of the pbu_type field in the pbu header immediately preceding it is identical to the value of the pub_type[i] field for a certain index i.

+ color_description_present_flag[i][j]
>indicates whether the color description information is provided for the jth variation of frame header whose value of the pbu_type field in the pbu header immediately preceding it is identical with the value of the pbu_type[i] field for a certain index i.
Expand Down Expand Up @@ -150,16 +150,16 @@ aligned(8) class APVDecoderConfigurationRecord {
> indicates the value of the transfer_characteristics field in the jth variation of the frame header of the frames whose value of the pbu_type field in the pbu header immediately preceding it is identical with the value of the pbu_type[i] field for a certain index i. If the value of number_of_frame_info[i] is 1, then the same value of this field must be used as the value of the transfer_characteristics field in the frame header of the frames whose value of the pbu_type field in the pbu header immediately preceding it is identical with the value of the pbu_type[i] field for a certain index i. If the value of number_of_frame_info[i] is 1 is greater than 1, then the frame header in each sample must provide the value of transfer_characteristics field matched with one among the values of this field for all index j for the frames whose value of the pbu_type field in the pbu header immediately preceding it is identical with the value of the pbu_type[i] field for a certain index i.

+ matrix_coefficients[i][j]
> indicates the value of the matrix_coefficients field in the jth variation of the frame header of the frames whose value of the pbu_type field in the pbu header immediately preceding it is identical with the value of the pbu_type[i] field for a certain index i. If the value of number_of_frame_info[i] is 1, then the same value of this field must be used as the value of the matrix_coefficients field in the frame header of the frames whose value of the pbu_type field in the pbu header immediately preceding it is identical with the value of the pbu_type[i] field for a certain index i. If the value of number_of_frame_info[i] is 1 is greater than 1, then the frame header in each sample must provide the value of matrix_cofficients field matched with one among the values of this field for all index j for the frames whose value of the pbu_type field in the pbu header immediately preceding it is identical with the value of the pbu_type[i] field for a certain index i.
> indicates the value of the matrix_coefficients field in the jth variation of the frame header of the frames whose value of the pbu_type field in the pbu header immediately preceding it is identical with the value of the pbu_type[i] field for a certain index i. If the value of number_of_frame_info[i] is 1, then the same value of this field must be used as the value of the matrix_coefficients field in the frame header of the frames whose value of the pbu_type field in the pbu header immediately preceding it is identical with the value of the pbu_type[i] field for a certain index i. If the value of number_of_frame_info[i] is 1 is greater than 1, then the frame header in each sample must provide the value of matrix_coefficients field matched with one among the values of this field for all index j for the frames whose value of the pbu_type field in the pbu header immediately preceding it is identical with the value of the pbu_type[i] field for a certain index i.

+ full_range_flag[i][j]
> indicates the value of the full_range_flag field in the jth variation of the frame header of the frames whose value of the pbu_type field in the pbu header immediately preceding it is identical with the value of the pbu_type[i] field for a certain index i. If the value of number_of_frame_info[i] is 1, then the same value of this field must be used as the value of
the full_range_flag field in the frame header of the frames whose value of the pbu_type field in the pbu header immediately preceding it is identical with the value of the pbu_type[i] field for a certain index i. If the value of number_of_frame_info[i] is 1 is greater than 1, then the frame header in each sample must provide the value of matrix_cofficients field matched with one among the values of this field for all index j for the frames whose value of the pbu_type field in the pbu header immediately preceding it is identical with the value of the pbu_type[i] field for a certain index i.
the full_range_flag field in the frame header of the frames whose value of the pbu_type field in the pbu header immediately preceding it is identical with the value of the pbu_type[i] field for a certain index i. If the value of number_of_frame_info[i] is 1 is greater than 1, then the frame header in each sample must provide the value of matrix_coefficients field matched with one among the values of this field for all index j for the frames whose value of the pbu_type field in the pbu header immediately preceding it is identical with the value of the pbu_type[i] field for a certain index i.

## APV Sample Description

### Format of sample
When APV coded bitstream is encapsulated in a track with APVSampleEntry, each sample shall contain one and only one access unit of APV coded data. The format of sample shall be same as the raw_bitstream_access_unit, the length field of four bytes preceeding the access unit data, as defined in the section 12.1 of [APV codec specification](#apv-codec).
When APV coded bitstream is encapsulated in a track with APVSampleEntry, each sample shall contain one and only one access unit of APV coded data. The format of sample shall be same as the raw_bitstream_access_unit, the length field of four bytes preceding the access unit data, as defined in the section 12.1 of [APV codec specification](#apv-codec).

### Sync sample
Every samples of APV bitstream shall be sync samples.
Expand Down Expand Up @@ -188,9 +188,9 @@ else {

tile_index for sub-samples based on tiles, this parameter indicates the tile index in raster order in a frame.

# Sub-parameters for the MIME tyype 'codecs' parameter
# Sub-parameters for the MIME type 'codecs' parameter

When the 'codecs' parameter of a MIME type is used for a track containing APV bistream, as defined in IETF RFC 6381, the sub-parameters defined in this section is used.
When the 'codecs' parameter of a MIME type is used for a track containing APV bitstream, as defined in IETF RFC 6381, the sub-parameters defined in this section is used.

The 'codecs' parameter string for the APV bitstream is defined as follows:

Expand Down