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audio/videoZONE Products for the week of August 24, 2009
Texas Instruments Says…
TPV5158: Multi-Channel Video Decoders Offer Superior Quality For Surveillance
Capture four channels of video with TVP515x devices featuring auto contrast control and video noise filtering for market leading video decode performance
Texas Instruments Incorporated (TI) introduced the new TVP5158, TVP5157 and TVP5156 multi-channel NTSC/PAL video decoders that deliver superior picture quality. The new devices feature advanced 2D adaptive comb filter core and image enhancement techniques, such as auto contrast and video noise filtering. With the ability to simultaneously decode four channels of video input, the new TVP515x solutions are ideal for video surveillance and video conferencing designs that require multiple-channels of decoding in a cost- and space-efficient manner. These applications include multi-channel digital video recorders (DVR), digital video servers (DVS), hybrid DVRs, cameras for video conferencing and digital signage products. Additionally, flexible video outputs on the TVP5158 and seamless interface to TI digital media processors based on DaVinci technology (TMS320DM6467 and TMS320DM365) reduce system cost by up to $10 by eliminating the need for an external FPGA.
EN-Genius Says…
You may not be able to imagine how horrifying it is for a video person like me to look at the first real page of a data sheet (preceded by textbook-like European introductions – this part is clearly not from either Dallas or Tucson…) to find in the features of these video decoders, “Accepts NTSC (J, M, 4.43) and PAL (B, D, G, H, I, M, N, Nc, 60) video data.”
Such technical ignorance truly makes my skin crawl. The products may be great, but how could you trust anything designed by a team who doesn’t understand the basic differences between baseband video and transmission standards?
This is not a marketing mistake. The same garbage is repeated in the main body of the data sheet where the writer (or design team) also does not understand the difference between YUV and YPbPr. And the misuse of words like luma just grates only mildly these days; it must have become standard mis-speak in college courses. As always these days, a dc restoration at the input is also incorrectly described as a clamp.
I would also question the premise that these parts are decoders. Taking analog inputs and converting those signals to a digital format is, unequivocally, encoding.
These parts are designed to interface to TI’s DaVinci processing. You certainly don’t want to get me started on that again.
The TVP5156, TVP5157, and TVP5158 are four channel video encoders for both PAL and NTSC composite signals, simulataneously, with auto “contrast” (gain, by any chance?) with an added four channel audio subsystem producing an I2S output in the TVP5157 and TVP5158. The TVP5158 additionally offers a line interleaved mode with metadata insertion.
The three encoders are in production in TQFP-128 with the TVP5156 priced at $7.25, the TVP5157 at $7.75 and the TVP5158 at $8.25, all in 1000-piece lots. An evaluation module will be available later in 2009.
Data Sheet
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