STA310 STMicroelectronics, STA310 Datasheet - Page 22

• Manufacturer Part Number: STA310
• Description: IC AUDIO DECODER 6+2CH 80-TQFP
• Manufacturer: STMicroelectronics
• Type: Audio Decoderr

Specifications of STA310

• Applications: HDTV, Players, Receivers, Set-Top Boxes
• Voltage - Supply, Analog: 2.5V
• Voltage - Supply, Digital: 2.5V
• Mounting Type: Surface Mount
• Package / Case: 80-TQFP, 80-VQFP
• Audio Codec Type: MP3 Decoder
• No. Of Dacs: 3
• No. Of Input Channels: 2
• No. Of Output Channels: 6
• Adc / Dac Resolution: 32bit
• Sampling Rate: 192kHz
• Interface Type: I2C, Serial, Parallel
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8856; STA310

STA310
4.6.5 MLP
MLP is a lossless coding system for use on digital audio data originally represented as linear PCM. MLP is man-
datory in DVD Audio. It allows transmission and storage of up to 6 channels. each up to 24 bits precision and
with sample rates between 44.1 KHz and 192KHz.
4.6.6 CDDA
4.6.7 Beep Tone
4.6.8 Pink noise generator
The pink noise generator can be used to position the speakers in the listening room so to benefit of the best
listening conditions.
The decoder must be programmed so to generate pink noise by writing 4 in the DECODESEL register. The
DOWNMIX register is used to select independently the channels on which the pink noise will be output.
When generating pink noise, the output configuration should be: OCFG=0 and PCM_SCALE=0.
Figure 13. Pink Noise Generator Flow
4.7 Post Processing
The following post processing alghorithms are available
4.7.1 Prologic
Pro Logic Compatible Downmix
The STA310 can decode an AC-3 multichannel bitstream and encode it to provide a 2-channel Pro Logic com-
patible output (Lt, Rt). These 2 channels are the result of a specific downmix referred to as Pro Logic compatible.
This downmix is selected by the register DOWNMIX. The 2 channels can be used as the input of a Pro Logic
decoder and player (e.g. home theatre).
Pro Logic Decoding
The STA310 can decode a 2-channel Pro Logic bitstream. The 2 channels could come from a CD player, an
AC-3 2-channel bitstream or an MPEG1 bitstream. The 2-channel bitstream can be converted into a 4-channel
output (L, R, C, S). The surround (S) is simultaneously sent on Ls and Rs channels. A Pro Logic downmix en-
22/90
- DECODESEL = 8
- DECODESEL = 5
- DECODESEL = 7
Noise
Pink
LFe
Ls
Rs
R
C
L
LFe
Ls
Rs
R
C
L