SDA9189X Просмотр технического описания (PDF) - Siemens AG

Номер в каталоге

Компоненты Описание

производитель

SDA9189X

ICs for Consumer Electronics Quarter PIP Processor

Siemens AG 

SDA 9189X

2.2.3 Decimation Filters

The input signal is decimated by subsampling with horizontal and vertical filtering. A

special antialias filter improves the frequency response of the luminance channel.

The following decimation filters are implemented:

Horizontal Decimation

2:1

3:1

4:1

6:1

Luminance Filter

{11}

{111}

{1111}

{111111}

Chrominance Filter

{11}

{121}

{1111}

{112211}

Vertical Decimation

2:1

3:1

4:1

6:1

Luminance Filter

{11}

{111}

{1111}

{111111}

Chrominance Filter

{11}

{121}

{1111}

{112211}

The realized chrominance filtering allows omitting the color decoder delay line for PAL

and SECAM demodulation if the color decoder supplies the same output voltages

independent of the kind of operation. In case of SECAM signals an amplification of the

chrominance signals by a factor of 2 is necessary because there is a signal only in every

second line. This chrominance amplification is programmable via I2C Bus (AMSEC).

Semiconductor Group

20

03.96

Share Link: