GeezerVison

Audio pack for LPCM

This pack is placed inside an MPEG private_stream_1. ( stream_id of 0xBD )
.

Byte offset	Field	Number of bits	Value	Description
0	sub_stream_id	8	1010 0***b	*** = Audio stream number
1	number_of_frame_headers	8	0xnnnn	Number of audio frames whose first byte is in this pack
2	first_access_unit_pointer	16	0xnnnn	Pointer to the first byte of the first frame that the PES PTS applies to.
4	audio_emphasis_flag	1	0 = off, 1 = on
	audio_mute_flag	1	0 = off, 1 = on
	reserved	1
	audio_frame_number	5		Frame number within Group of Audio frames.
5	quantisation_word_length	2	0 = 16, 1 = 20, 2 = 24, 3 = reserved	Bits per sample
	audio_sample_frequency	2	0 = 48, 1 = 96, other = reserved	Sampling frequency in kHz.
	reserved	1
	number_of_audio_channels	3	X + 1	0 = 1ch, 1 = 2ch etc.
6	dynamic_range X	3	X	High 3 bits of byte.
	dynamic_range Y	5	Y	Lower 5 bits of byte
				linear gain = 2^(4-(X+(Y/30)))
				in dB gain = 24.082 - 6.0206 X - 0.2007 Y

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