Electronic Design

Video Decoder Chips Let Portable Or Wired Systems Handle All Formats

A pair of video signal decoders simplify the task of converting NTSC, PAL, and SECAM video signals into digital component video for both portable (mobile phones, PDAs, etc.) and wired systems (set-top boxes, digital televisions, etc.)—the TVP5150 and 5146, respectively.

The TVP5150 comes in a small 32-lead TQFP. It has inputs for two composite or one S-Video signal and consumes just 115 mW during typical operation. For higher-end systems, the TVP5146 handles S-Video, YPbPr, or RGB input signals and includes both a five-line adaptive comb filter for best-in-class Y/C separation and four 10-bit, 30-Msample/s analog-to-digital converters for superior noise performance. The TVP5146 comes in an 80-lead TQFP and draws about 400 mW. Both decoders support the Macrovision copy-protection detection scheme.

Production quantities of either chip are available. In lots of 10,000 units, the TVP5150 costs $5.23 while the TVP5146 goes for $10.87.

Texas Instruments Inc.

See associated figures 1 and 2

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