CP-520/520A/520F Service Manual

decoding is done in the DEMDEC block of the Sound DSP. The DEMDEC processing will be described in the next chapter.

The audio signals (AUD ADC IN) from the analogue crossbar pass the audio ADC and are fed directly into the AUDIO part of the Sound DSP like the I2S signals, which is coming from I2S processing hardware. After level adjust all signals from the DEMDEC and the I2S input are available at the digital input crossbar. A special input is provided for the Noise/Silence Generator needed for olby® Pro Logic® processing.

In standard TV applications the main channel signal(L,R) will be connected to the DAC2 for reproduction at the speakers. With multichannel signals centre, surround or subwoofer channels may be passed to the I2S outputs where external DACs may be applied. By this it is possible to build Dolby Normal/Wide, Dolby Phantom Centre or Dolby 3 Stereo set-ups and also a VDS423 application.

5.4.3 Demodulator and decoder

INTRODUCTION

The TV sound processor provides an easy-to-use programming interface and built-in intelligence for the demodulator and decoder part.

The sound demodulator is able to search for sound carriers and react to transmission mode changes autonomously, without interaction of the micro controller software.

It is possible for a typical terrestrial TV application to setup the entire demodulator with transmission of few control words.

The control interface still allows access to every detail, called demodulator expert mode, for special applications such as satellite TV, more elaborated search algorithms etc.

The new TV Sound ProcessorDemodulator and DecoderEasyProgramming(DDEP)interfaceprovides three possible approaches to setup the demodulator and decoder parts:

nAuto Standard Detection (ASD)

nStatic Standard Selection (SSS)

nDemodulator and Decoder Expert Mode (DDXM)

MIXER

The digitized 2nd SIF input signal is fed to the mixers, which mix one or both input sound carriers down to zero IF. The mixer frequency is derived by the standard setting (Easy Programming) or in the Demodulator and Decoder Expert Mode (DDXM) by a 24-bit control word for each carrier. For NICAM demodulation, a feedback signal is added to the control word of the second carrier mixer to establish a carrier-frequency loop.

FMANDAMDEMODULATION

An FM or AM input signal is fed via a band-limiting filter to a one of two demodulators that can be used for either FM or AM demodulation. Four filters with different bandwidth are available. The

DTV R&D Europe

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Daewoo DTY-21U7/21B4, DTZ-29U7/U3, DTZ-2881/28W8, DTC-21Y1/21Y2, DTC-20T2, DTZ-2481 Introduction, Mixer, Fmandamdemodulation
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DTZ-2481, DTZ-29U7/U3, DTC-21Y1/21Y2, DTY-21U7/21B4, DTY-2880/28W5 specifications

The Daewoo DTC-20T2, DTY-28A8, DTY-28A6, DTY-28A7, DTZ-2881/28W8, DTY-25G6/25G7, and DTY-2880/28W5 represent a range of innovative and feature-rich vehicles that reflect Daewoo's commitment to quality and advanced technology. Each model combines sleek design with performance excellence, appealing to a wide range of consumers.

Starting with the DTC-20T2, this compact car offers a combination of efficiency and agility. Its lightweight design enhances fuel economy while maintaining stability on the road. Equipped with a state-of-the-art engine, the DTC-20T2 delivers a responsive drive, making it ideal for city commuting and weekend getaways.

The DTY-28A8 is known for its spacious interior and comfort features. It boasts advanced infotainment systems, including touch screens and smartphone connectivity, catering to modern drivers. Safety is paramount, with multiple airbags and advanced braking systems ensuring peace of mind on every journey.

Similarly, the DTY-28A6 and DTY-28A7 share many design elements but have unique enhancements that differentiate them. They incorporate advanced suspension systems that provide a smooth driving experience while navigating urban and rural landscapes. These models also feature high-efficiency engines that strike a balance between power and fuel consumption.

Moving to the DTZ-2881/28W8, this vehicle makes a statement with its bold design and robust performance. This model is designed with aerodynamics in mind, reducing drag and enhancing fuel efficiency. It includes innovative technologies like regenerative braking, which captures energy during deceleration, extending the vehicle's overall efficiency.

The DTY-25G6/25G7 and DTY-2880/28W5 are particularly impressive with their emphasis on versatility. These models offer various configurations and layouts to cater to different needs, whether for families or individuals. They feature expanded cargo capacity and modular seating arrangements that can accommodate both passenger and transportation requirements.

In conclusion, the Daewoo DTC-20T2, DTY-28A8, DTY-28A6, DTY-28A7, DTZ-2881/28W8, DTY-25G6/25G7, and DTY-2880/28W5 showcase a blend of performance, technology, and comfort across their varying models. From advanced safety features to innovative fuel efficiency technologies, these vehicles are tailored to meet the needs of a diverse clientele, reinforcing Daewoo’s stature in the automotive industry.
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