A TV analogue to digital conversion system

Author

Newton, Anthony D. ; Maeder, Heinz

Author_Institution

Motorola Inc., Phoenix, AZ, USA

Volume

37

Issue

4

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

829

Lastpage

839

Abstract

A two-chip system has been developed to simplify the conversion of analog TV signals into a digital format suitable for storage in a field store used in picture applications or for use in a computer environment. In this type of application, the system clock is usually required to be a discrete multiple of horizontal line frequency, i.e. line locked. The system consists of a bipolar signal processor driving a CMOS triple analog-to-digital converter. An external divider gives the required division ratio between the system clock and the TV horizontal line rate. Signals are accepted in all standard formats, i.e. NTSC/PAL/SECAM composite video, luminance with color difference signals, S-VHS, or RGB. Separate composite sync signals may be used in conjunction with these signals. Measurement results for the A/D converter are given

Keywords

CMOS integrated circuits; analogue-digital conversion; bipolar integrated circuits; television systems; video signals; CMOS; NTSC; PAL; RGB; S-VHS; SECAM; TV ADC system; TV horizontal line rate; analog TV signals; bipolar signal processor; color difference signals; composite sync signals; composite video; computer environment; digital format; divider; division ratio; field store; luminance; measurement results; picture applications; system clock; Analog-digital conversion; Application software; Clocks; Counting circuits; Decoding; Digital-to-frequency converters; Frequency; IIR filters; Signal processing; TV;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.106946

Filename

106946