VS1053B Datasheet, PDF (45/79 Pages) List of Unclassifed Manufacturers – Ogg Vorbis/MP3/AAC/WMA/MIDI AUDIO CODEC

VLSI
Solution ^y
VS1053b preliminary
VS1053B
8. FUNCTIONAL DESCRIPTION
8.7.9 SCI HDAT0 and SCI HDAT1 (R)
For WAV files, SCI HDAT1 contains 0x7665 (“ve”). SCI HDAT0 contains the data rate measured in
bytes per second for all supported RIFF WAVE formats: mono and stereo 8-bit or 16-bit PCM, mono
and stereo IMA ADPCM. To get the bitrate of the file, multiply the value by 8.
For AAC ADTS streams, SCI HDAT1 contains 0x4154 (“AT”). For AAC ADIF files, SCI HDAT1 con-
tains 0x4144 (“AD”). For AAC .mp4 / .m4a files, SCI HDAT1 contains 0x4D34 (“M4”). SCI HDAT0
contains the average data rate in bytes per second. To get the bitrate of the file, multiply the value by 8.
For WMA files, SCI HDAT1 contains 0x574D (“WM”) and SCI HDAT0 contains the data rate measured
in bytes per second. To get the bitrate of the file, multiply the value by 8.
For MIDI files, SCI HDAT1 contains 0x4D54 (“MT”) and SCI HDAT0 contains the average data rate in
bytes per second. To get the bitrate of the file, multiply the value by 8.
For Ogg Vorbis files, SCI HDAT1 contains “Og”. SCI HDAT0 contains the average data rate in bytes
per second. To get the bitrate of the file, multiply the value by 8.
For MP3 files, SCI HDAT1 is between 0xFFE0 and 0xFFFF. SCI HDAT1 / 0 contain the following:
Bit
HDAT1[15:5]
HDAT1[4:3]
HDAT1[2:1]
HDAT1[0]
HDAT0[15:12]
HDAT0[11:10]
HDAT0[9]
HDAT0[8]
HDAT0[7:6]
HDAT0[5:4]
HDAT0[3]
HDAT0[2]
HDAT0[1:0]
Function
syncword
ID
layer
protect bit
bitrate
samplerate
pad bit
private bit
mode
extension
copyright
original
emphasis
Value
2047
3
2
1
0
3
2
1
0
1
0
3
2
1
0
1
0
3
2
1
0
1
0
1
0
3
2
1
0
Explanation
stream valid
ISO 11172-3 MPG 1.0
ISO 13818-3 MPG 2.0 (1/2-rate)
MPG 2.5 (1/4-rate)
MPG 2.5 (1/4-rate)
I
II
III
reserved
No CRC
CRC protected
see bitrate table
reserved
32/16/ 8 kHz
48/24/12 kHz
44/22/11 kHz
additional slot
normal frame
not defined
mono
dual channel
joint stereo
stereo
see ISO 11172-3
copyrighted
free
original
copy
CCITT J.17
reserved
50/15 microsec
none
Version 0.5, 2007-12-03
45