Low-cost video decoder with 2D2L comb filter for NTSC digital TVs

Author

Wang, Chua-Chin ; Lee, Ching-Li ; Chang, Ming-Kai

Author_Institution

Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan

Volume

51

Issue

2

fYear

2005

fDate

5/1/2005 12:00:00 AM

Firstpage

694

Lastpage

698

Abstract

A low-cost video decoder for NTSC signals is described in this paper. The proposed NTSC video decoder design employs a 2D2L comb filter, and a DDFS (direct digital frequency synthesizer)-based DCO (digital control oscillator) based on a trigonometric quadruple angle formula in a digital PLL to track and lock the demodulation clocks. The complexity of the digital video decoder is consequently drastically reduced. The overall cost of the proposed design is 7.22 mm² (26 K gates). The maximum power dissipation is 109.2 mW at the highest clock rate which is 21.48 MHz.

Keywords

comb filters; decoding; digital phase locked loops; digital television; direct digital synthesis; oscillators; video coding; 109.2 mW; NTSC signals; comb filter; digital PLL; digital TV; digital control oscillator; direct digital frequency synthesizer; power dissipation; trigonometric quadruple angle; video decoder; Clocks; Costs; Decoding; Demodulation; Digital control; Digital filters; Digital-controlled oscillators; Frequency synthesizers; Phase locked loops; Signal synthesis;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/TCE.2005.1468021

Filename

1468021