VS1033 Datasheet, PDF (37/70 Pages) List of Unclassifed Manufacturers – MP3/AAC/WMA/MIDI AUDIO CODEC

VLSI
Solution ^y
VS1033a PRELIMINARY
VS1033A
8. FUNCTIONAL DESCRIPTION
8.6.9 SCI HDAT0 and SCI HDAT1 (R)
For WAV files, SCI HDAT1 contains 0x7665 (“ve”). SCI HDAT0 contains the data rate in double word
increments for all supported RIFF WAVE formats: mono and stereo 8-bit or 16-bit PCM, mono and
stereo IMA ADPCM. To get the byte rate of the file, multiply the value by 4. To get the bit rate of the
file, multiply the value by 32. Note: usage of SCI HDAT0 with WAV files has changed from VS1003.
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 bit rate 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 bit rate 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 bit rate of the file, multiply the value by 8. Note: usage of SCI HDAT0 with
MIDI has changed from VS1003.
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
sample rate
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 0.6, 2005-01-05
37