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As the security and surveillance market continues to grow, there is a growing need for low-cost format conversion of video captured by traditional analog cameras. As a highly integrated, feature-rich, new device, the TVP5154 quad-channel video decoder is perfectly suited to these needs with the proven architecture of the TI TVP5150AM1 single-channel video decoder. Each decoder of the TVP5154 accepts dual composite inputs and receives a total of eight independent camera inputs, enabling conversion of formats such as NTSC, PAL and SECAM to digital video output streams. The device's patented technology helps to improve the quality of weak, disturbing or unstable signals, and the technology provides additional support for non-standard video signals. In addition, the device can be used not only as a front end for various video processing engines, but also directly with a TI TMS320DM642 DSP-based video processor.
The TVP5154 Quad Channel Video Decoder's many features provide additional flexibility and enhanced performance for security applications. The device integrates four independent H/V converters, which not only allows for a reduction in the proportion of image output, but also offers a variety of options to support single or simultaneous output of full-size or scaled-down images. The TVP5154 takes on the zoom function, saving valuable processing power for the video processor. For example, in the DM642, the TVP5154's scaling capability frees up 10% to 15% of the processing load, allowing developers to take advantage of additional processing power to implement value-added algorithms such as deinterlacing and target recognition.
To simplify control communication, reduce board space and layout complexity, the TVP5154 uses four dedicated I2C addresses, allowing a single I2C bus to connect up to four TVP5154 devices (16 video channels). In addition, the device can program the TVP5154's four integrated video decoders simultaneously or separately. Moreover, each TVP5154 device requires only a single 14.31818 crystal to drive, saving board space and cost.
The TVP5154 supports fast lock mode, which allows the decoder to convert up to 2.5 video inputs. During the input conversion process, the current input gain and offset settings are stored, which increases the locking speed and extends the convergence time of the automatic gain control. The stable synchronous output feature supports a fixed number of lines in the case of active video, ensuring a stable output signal.
The TVP5154 Quad Channel Video Decoder is now in Volume production and is available for order through TI and its authorized distributors. The device is available in a space-saving 16 x 16 mm 128-pin small outline quad flat package (LQFP) and is priced at $9.00 per unit in 1,000-unit quantities.
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