TABLE OF CONTENTS These MPEG-2 descriptors are used to identify commonly used private (non-MPEG-2) information that is present in the MPEG-2 transport or program stream.
A descriptor is typically contained within a descriptor_loop in the MPEG-2 PMT or PSM. The general format of a descriptor is:
descriptor_tag (8 bits)
descriptor_length (8 bits)
data
Descriptor tag values of 0, 1, and 42-63 are reserved. Values of 19-26 are reserved for MPEG-2 Part 6 data. Unless otherwise indicated, descriptors may be present in both transport and program streams.
This MPEG-2 descriptor provides basic information which identifies the coding version of an audio elementary stream.
This 8-bit field has a value of "0000 0011."
This 8-bit binary number specifies the number of bytes following this field. It has a value of "0000 0001."
A "1" for this bit indicates the bitrate_index field in the audio stream is "0000."
This bit is set to the same value as the ID field in the audio stream.
This 2-bit binary number is set to the same or higher value as the highest layer in any audio stream.
A "0" for this bit indicates that the bit rate of the audio stream does not vary between audio frames.
These three bits are always "111."
For individual MPEG-4 Part 10 (H.264) streams carried in PES packets, this MPEG-4 descriptor provides basic information for identifying the coding parameters.
This 8-bit field has a...
