STA310 STMicroelectronics, STA310 Datasheet - Page 69

• 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

Description:
MP_DOWNMIX
MPEG downmix
Address: 0x6F
Type: R/W
Software Reset: 0x08
Hardware Reset: UND
Description:
In the table below, L
the output channels after downmix, and L, R, C, L
R
The coefficients K
of input channels. In the above table, the equations
are given for a 5 channels input bitstream. If the input
bitstream does not contain five channels (L, C, R, L
R
not present is equal to 0.
If the MPEG bitstream contains only one surround
channel (S), replace (K
MC
DEN
Bitfield
S
S
7
), the coefficient “Kj” corresponding to the channel
are the audio channels.
6
When MC=1, the multi-channel part of the
bitstream is not decoded, only the MPEG-1
compatible bitstream is decoded. Bit MC must
be set to 1 for an MPEG-1 bitstream.
De-normalization: set DEN=0 for MPEG1
signals, and set DEN=1 for MPEG2 multi-
channel signals
When DEN=1, MPEG2 multi-channel signals
L, C, R, LS and RS can be de-normalized.
The signals must first be inverse-weighted
then multiplied by the de-normalization factor.
This undoes the attenuation carried out at the
encoder side to avoid overload when
calculating the compatible signals (see MPEG
13818-3 specifications).
5
j
, K
C
O
, K
4
, R
S
r
Description
, K
O
x (L
, C
S
3
, depend on the number
S
O
, Ls
+ R
2
O
S
)), (K
, Rs
O
1
S
represent
x L
S
0
and
S
S
,
,
(K
0x00
0x01
Value
0x0A 2/0 Karaoke
0x0B 2/0 Karaoke
0x0C 2/0 Karaoke
0x0D 2/0 Karaoke
0x0E 2/0 Karaoke
0x0F 2/0 Karaoke
0x1A 3/0 Karaoke
0x02 3/0 (L, C, R)
0x03 2/1 (L, R, S)
0x04 3/1 (L, C, R, S)
0x05 2/2 (L, R, L
0x06 3/2 (L, C, R, L
0x09 2/0 (Dolby
S
x R
1/0 (C) = Mono
2/0 (L, R) =
Stereo
R
surround L
capable: V1 ON,
V2 ON
Capable: V1 ON,
V2 OFF
Capable: V1 OFF,
V2 ON
Capable: V1 OFF,
V2 OFF
Capable: V1 ON,
V2 OFF (Dolby
Digital like)
Capable: V1 OFF,
V2 ON (Dolby
Digital like)
Capable: V1 ON,
V2 ON
S
) by (K
S
Output Mode
)
S
T
x S) in the above equations.
S
, R
, R
S
T
S
,
)
) L
C
(L
L
(1 + K
R
(1 + K
L
K
L
x C, Ls
R
L
= Rs
x C, Ls
L
= L
L
(LS + R
R
0.5 (L
Lk = L + 0.707 A1 + 0.707 G,
Rk = R + 0.707 A2 + 0.707 G
Lk = L + 0.707 A1 + 0.707 G,
Rk = R + 0.707 G
Lk = L + 0.707 G, Rk = R +
0.707 A2 + 0.707 G
Lk = L + 0.707 G, Rk = R +
0.707 G
Lk = L + 0.707 A1 + 0.707 G,
Rk = R + 0.707 A1 + 0.707 G
Lk = L + 0.707 A2 + 0.707 G,
Rk = R + 0.707 A2 + 0.707 G
Lk = L + 0.707 A1, Ck = G, Rk
= R + 0.707 A2
T
O
O
O
O
O
O
S
O
O
S
T
S
= (L + 0.707C - 0.707 x 0.5
)
= L + K
= L + K
S
= (L + K
= L + K
= L, R
= L, R
= (R + 0.707C + 0.707 x
x R
= K
= (R + K
+ R
, Rs
O
S
C
C
S
= K
j
O
O
S
+ R
S
+ K
+ K
, C
x L + C + K
O
)
)) /2.414,
= Rs
= L
O
O
Comment
C
S
C
= R
S
O
S
S
C
S
= R, C
= R, C
C
x C, R
x (L
x C, R
S
)
x L
)) /2.414
),
= C
x C + K
, Rs
O
x C + K
S
S
= K
S
, R
O
+ R
O
O
O
O
r
STA310
S
O
= R
= C, Ls
= C, Ls
= R + K
= R + K
x R + K
S
x (L
S
S
= R +
)
x L
S
x R
69/90
S
S
)/
S
+
O
O
S
C
C
)/