Insignia IN-CS102 User Manual (English) - Page 13

Wma Operation, Audio Dsp Mp3/wma Decoder, Caution

Page 13 highlights

OPERATION KEY Assigned IN Searching mode(Table 1) AS/PS BND/LOU M1 M2 M3 M4 M5 M6 Mode Select ENTER A, B, C, 1 D, E, F, 2 G, H, I, 3 J, K, L, 4 M, N, O, 5/ Directory DOWN P, Q, R, 6/ Directory UP MOD S, T, U, 7 MANU/SKIP DOWN V, W, X, 8 MANU/SKIP UP SEL DSP VOLUME KNOB Y, Z, SPACE, 9 CHARACTER SHIFT RIGHT _, -, +, 0 CHARACTER SELECT (A, B - 8, 9, 0) VOLUME KONB (ENCODER) & MANU/SKIP UP/DOWN buttons: Searching file and directory during Navigation. WMA OPERATION The unit that can play the WMA disc and the operation is the same with MP3 operation described above. AUDIO DSP (MP3/WMA DECODER) The audio DSP converts MP3/WMA stream data sent from the CD-ROM decoder to PCM data. The following standards and bit rate are supported. Standard MPEG1 Audio LAYER3 (48kHz/ 44.1kHz/ 32kHz) MPEG2 Audio LSF LAYER3 (24kHz/ 22.05kHz/ 16kHz) Windows Media Audio (32kHz) Windows Media Audio (44.1kHz) Windows Media Audio (44.1kHz) Windows Media Audio (48kHz) Bit Rate (kbps) 320,256,224, 192,160,128, 112,96,80,64, 56,48,40,32 160,144,128, 112,96,80,64, 56,48,40,32, 24,16,8 48 48 320,256,192, 160,128,96, 80,64,48 192,160,128 Supported Mode STEREO JOINT STEREO DUAL CHANNEL SINGLE CHANNEL STEREO JOINT STEREO DUAL CHANNEL SINGLE CHANNEL STEREO SINGLE CHANNEL STEREO STEREO The audio DSP automatically identifies the supported bit rate and mode, and sampling frequency. MP3 and WMA must be identified by the microcontroller. CAUTION: VBR of WMA can be played back if the bit rate is 48 kbps or higher. If a bit rate of less than 48 kbps exists in a stream, that stream cannot be correctly played back. You are suggested to play the WMA stream data with the sampling frequency of 44.1kHz and the bit rate over 128kbps, then you can get better effect. 13

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KEY Assigned IN Searching mode(Table 1)
VOLUME KONB (ENCODER) &
MANU/SKIP UP/DOWN buttons:
Searching file and directory during
Navigation.
WMA OPERATION
The unit that can play the WMA disc and
the operation is the same with MP3
operation described above.
AUDIO DSP (MP3/WMA DECODER)
The audio DSP converts MP3/WMA
stream data sent from the CD-ROM
decoder to PCM data.
The following standards and bit rate are
supported.
The audio
DSP
automatically identifies
the supported bit rate and mode, and
sampling frequency. MP3 and WMA must
be identified by the microcontroller.
CAUTION:
VBR of WMA can be played
back if the bit rate is 48 kbps or higher.
If a bit rate of less than 48 kbps exists in
a stream, that stream cannot be correctly
played back.
You are suggested to play the WMA
stream data with the sampling frequency
of 44.1kHz and the bit rate over 128kbps,
then you can get better effect.
OPERATION
13
Standard
Bit Rate (kbps)
Supported Mode
MPEG1 Audio
320,256,224,
STEREO
LAYER3
192,160,128,
JOINT STEREO
(48kHz/
112,96,80,64,
DUAL CHANNEL
44.1kHz/
56,48,40,32
SINGLE CHANNEL
32kHz)
MPEG2 Audio
160,144,128,
STEREO
LSF LAYER3
112,96,80,64,
JOINT STEREO
(24kHz/
56,48,40,32,
DUAL CHANNEL
22.05kHz/
24,16,8
SINGLE CHANNEL
16kHz)
Windows
48
STEREO
Media Audio
(32kHz)
Windows
48
SINGLE CHANNEL
Media Audio
(44.1kHz)
Windows
320,256,192,
STEREO
Media Audio
160,128,96,
(44.1kHz)
80,64,48
Windows
192,160,128
STEREO
Media Audio
(48kHz)
AS/PS
Mode Select
BND/LOU
ENTER
M1
A, B, C, 1
M2
D, E, F, 2
M3
G, H, I, 3
M4
J, K, L, 4
M5
M, N, O, 5/
Directory DOWN
M6
P, Q, R, 6/
Directory UP
MOD
S, T, U, 7
MANU/SKIP
V, W, X, 8
DOWN
MANU/SKIP
Y, Z, SPACE, 9
UP
SEL
CHARACTER
SHIFT RIGHT
DSP
_,
, +, 0
VOLUME
CHARACTER SELECT
KNOB
(A, B - 8, 9, 0)