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IC DESCRIPTION
8 GENERAL DESCRIPTION OF THE TV SOUND OF SOUND PROCESSOR
The TV Sound Processor is a digital TV sound processor for analog multi-channel sound
systems in TV sets. It is based on a 24 bit DSP and designed to support several applications.
A new easy-to-use control concept was implemented for easiest configuration programming of
the very complex functionality of the TV Sound Processor. Pre-defined setups are available for
all implemented sound processing modes. Aloud speaker switching concept allows it to adapt
the pre-defined setups to the specific loudspeaker application.The built-in intelligence for pre-
defined standards and Auto Standard Detection (ASD) allows an easy setup of the demodulator
and decoder part.
The control concept for the audio processor is based on the following new features:
> Pre-defined setups for the sound processing modes like Dolby® Pro Logic® and Virtual
Dolby® Surround (422, 423)
> Flexible configuration of audio outputs to the loudspeaker configuration with an additional
output crossbar
> Master volume function
The control concept for the demodulator and decoder (DEMDEC) is based on the following new
features:
> Easy demodulator setup for all implemented standards with Demodulator and Decoder Easy
Programming (DDEP) for a pre-selected standard or combined with Auto Standard Detection
(ASD) for automatic detection of a transmitted standard
Other features of the DEMDEC are:
> M/BTSC and N standards supported
> M/Japan (EIAJ) supported
> FM Radio stereo decoding
> Alignment-free, fully digital system
> For BTSC full dbx® performance
> SAP demodulation (without dbx®) simultaneously with stereo decoding, or mono plus SAP
with dbx®
> Line/pilot frequency selectable from 15.734 kHz and 15.625 kHz (or automatic detection /
auto search)
> High selectivity for pilot detection, high robustness against high-frequent audio components
> Pilot lock indicator
> SAP detector
> Separate noise detectors for stereo and SAP with adjustable threshold levels, hysteresis,
and automute function.
An overview of the supported standards and sound systems and their key parameters is given
in the following tables.
The analog multi-channel sound systems (A2, A2+ and A2*) are sometimes also named 2CS (2
carrier systems).
Summary of Contents for DTU-29M5ME
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