saa7712h NXP Semiconductors, saa7712h Datasheet - Page 4

• Manufacturer Part Number: saa7712h
• Description: Sound Effects Dsp
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Depending on the sample frequency several combinations
of the above mentioned features are possible.
2
The SAA7712H can be used in TV sets with:
1999 Aug 05
Voice cancelling (karaoke): Rejects voice out of
source material, mainly intended to be used with
karaoke. Several karaoke modes available in stereo
mode and in Dolby Pro Logic mode, such as (auto) voice
cancel, (auto) centre voice cancel, (auto) multi left and
(auto) multi right.
Microphone mix modes (karaoke): Mono microphone
mixed to left, right and centre channel
Spectrum analysis: 3-band spectrum analyser is
provided
Dolby B: Both a Dolby B encoder as well as a Dolby B
decoder is implemented
2 Room solution: In all modes not requiring more than
2 output channels (stereo and karaoke incredible
surround) it is also possible to feed the source signal to
the other 2 output channels (with same processed or
not processed signal)
Dynamic Bass Enhancement (DBE): Dynamic bass
enhancement generates a sub-woofer channel, which is
either a separate output or is added to the front channels
Volume processing: Independent volume processing
of all 4 output channels
AC-3/MPEG-2: Inputs available intended to be used
with an AC-3/MPEG-2 co-processor. In this mode the
SAA7712H can be used as post-processor.
Output redirection: Several output configurations are
possible (normal 4 channel, special 4 + 2 channel,
record 2 + 2 channel, 6 or 6 + 2 channel).
Dolby Pro Logic Surround, incredible surround,
3D Surround and advanced acoustics processing
Multi-channel sound decoding (AC-3 and MPEG-2) on a
co-processor. The SAA7712H can be used for
post-processing.
Sound effects DSP
APPLICATIONS
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The SAA7712H provides for digital signal processing
power in TV systems and home theatre systems.
A DSP core is equipped with digital inputs and outputs, a
5-band parametric equalizer accelerator, a digital
co-processor interface and a delay line memory. This
architecture accommodates on-chip standard sound
processing, incredible surround, Dolby Pro Logic Surround
and other surround sound processing algorithms.
The architecture also supports co-processing, e.g. to add
to the processing power of the internal DSP core or for
multi-channel surround decoding.
All settings and parameters are controlled by an I
interface. The available interfaces support a high
application flexibility.
The DSP core communicates over 32 dedicated registers.
The selected digital input is master for the data rate of the
DSP core. This input can be selected among 2 slave
I
through 4 DACs and then routed to 4 output pins.
Two master I
inputs can serve as an I
Eight of the remaining registers are used for
communication with the hardware equalizer, and eight for
communication with the delay line memory.
All I
format as well as 16, 18 and 20-bit LSB-justified formats.
2
S-bus inputs. The 4 outputs from the core are passed
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GENERAL DESCRIPTION
S-bus inputs and outputs support the Philips I
2
S-bus outputs and two master I
2
S-bus co-processor interface.
Preliminary specification
SAA7712H
2
S-bus
2
C-bus
2
S-bus