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Chip combines four video decoders

Posted: 12 Apr 2006 ?? ?Print Version ?Bookmark and Share

Keywords:TVP5154? video decoder? analog-to-digital? A/D? Texas Instruments?

Texas Instruments Inc. introduced a new A/D video decoder that combines four independent video decoders into a single chip. The new TVP5154 quad A/D video decoder aims to simplify layout, and is said to save up to 25 percent in board space over previous products. Each channel of the TVP5154 features a programmable horizontal/vertical (H/V) scaler that can offload processing from associated video processors.

The TVP5154 converts NTSC, PAL and SECAM formats to digital video output streams. It operates as a front end for a wide variety of video processing engines and is designed for direct connection to TI's TMS320DM642 DSP-based video processor. The device integrates four independent H/V scalers that permit downscaling of image outputs and is said to provide options for single or simultaneous output of full-scale and down-scaled images.

The TVP5154 features four dedicated I2C addresses, which allow for up to four TVP5154 devices (16 video channels) on a single I2C bus. TI reported that only one 14.31818 crystal is required to drive each TVP5154.

The product supports a fast lock mode, which is said to enable the decoder to switch from video inputs in less than 2.5 fields. When switching between inputs, the gain and offset settings of the current input are stored. A stable sync output feature allows for a fixed number of lines during active video. The device can program the integrated video decoders simultaneously or individually.

The TVP5154 quad video decoder is in production today. It is packaged in a 16-by-16mm, 128-pin low-profile quad flatpack (LQFP). Pricing is $9 per unit in quantities of 1,000.

The TVP5154 evaluation module with the DM642 video processor provides an evaluation platform with integrated DSP code, Windows control software and an encoder daughter card for video output. The control software provides settings for standard downscaled resolutions including VGA, QVGA, CIF, QCIF and SIF. The EVM is scheduled for release by the end of April 2006, with pricing planned at $649 per unit.

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Related Datasheets
Part Number Description Category
? TVP5154 TVP5154 (Rev. A) Passives - Filters, Oscillators and Resonators



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