Product Descriptions

The TVP5146 device is a high quality, single-chip digital video decoder that digitizes and decodes all popular baseband analog video formats into digital component video. The TVP5146 decoder supports the analog-to-digital (A/D) conversion of component RGB and YPbPr signals, as well as the A/D conversion and decoding of NTSC, PAL, and SECAM composite and S-video into component YCbCr. This decoder includes four 10-bit 30-MSPS A/D converters (ADCs). Preceding each ADC in the device, the corresponding analog channel contains an analog circuit that clamps the input to a reference voltage and applies a programmable gain and offset. A total of 10 video input terminals can be configured to a combination of RGB, YPbPr, CVBS, or S-video video inputs.

Component, composite, or S-video signals are sampled at 2× the square-pixel or ITU-R BT.601 clock frequency, line-locked, and are then decimated to the 1× pixel rate. CVBS decoding utilizes five-line adaptive comb filtering for both the luma and chroma data paths to reduce both cross-luma and cross-chroma artifacts. A chroma trap filter is also available. On CVBS and S-video inputs, the user can control video characteristics such as contrast, brightness, saturation, and hue via an I2C host port interface. Furthermore, luma peaking (sharpness) with programmable gain is included, as well as a patented chroma transient improvement (CTI) circuit.

A built-in color space converter is applied to decoded component RGB data.

The following output formats can be selected: 20-bit 4:2:2 YCbCr or 10-bit 4:2:2 YCbCr.

The TVP5146 decoder generates synchronization, blanking, field, active video window, horizontal and vertical syncs, clock, genlock (for downstream video encoder synchronization), host CPU interrupt and programmable logic I/O signals, in addition to digital video outputs.

The TVP5146 decoder includes methods for advanced vertical blanking interval (VBI) data retrieval. The VBI data processor (VDP) slices, parses, and performs error checking on teletext, closed caption (CC), and other VBI data. A built-in FIFO stores up to 11 lines of teletext data, and with proper host port synchronization, full-screen teletext retrieval is possible. The TVP5146 decoder can pass through the output formatter 2× the sampled raw luma data for host-based VBI processing.

The decoder provides the option for concurrent processing of pixel-locked CVBS and RGB/YPbPr input formats.

Product Features

• Four 30-MSPS, 10-bit A/D channels with programmable gain control 

• Supports NTSC (J, M, 4.43), PAL (B, D, G, H, I, M, N, Nc, 60), SECAM (B, D, G, K, K1, L), CVBS, and S-video 

• Supports analog component SD YPbPr/RGB video formats with embedded sync 

• 10 analog video input terminals for multisource connection 

• User-programmable video output formats 

− 10-bit ITU-R BT.656 4:2:2 YCbCr with embedded syncs 

− 10-bit 4:2:2 YCbCr with separate syncs 

− 20-bit 4:2:2 YCbCr with separate syncs 

− 2× sampled raw VBI data in active video during a vertical blanking period 

− Sliced VBI data during a vertical blanking period or active video period (full field mode) 

• HSYNC/VSYNC outputs with programmable position, polarity, and width, and FID (field ID) output 

• Component video processing 

− Gain (contrast) and offset (brightness) adjustments 

− Automatic component video detection (525/625) 

− Color space conversion from RGB to YCbCr 

• Composite and S-video processing 

− Adaptive 2-D, 5-line, adaptive comb filter for composite video inputs; chroma trap available 

− Automatic video standard detection (NTSC/PAL/SECAM) and switching 

− Luma-peaking with programmable gain 

− Patented CTI circuit 

− Patented architecture for locking to weak, noisy, or unstable signals 

− Single 14.31818-MHz reference crystal for all standards (ITU-R.BT601 and square pixel) 

− Line-locked internal pixel sampling clock generation with horizontal- and vertical-lock signal outputs 

− Genlock output [real-time control (RTC] format) for downstream video encoder synchronization 

• Certified MacrovisionTM copy protection detection

• VBI data processor 

− Teletext (NABTS, WST) 

− CC and extended data service (EDS) 

− Wide screen signaling (WSS) 

− Copy generation management system (CGMS) 

− Video program system (VPS/PDC) 

− Vertical interval time code (VITC) 

− GemstarTM 1×/2× electronic program guide compatible mode 

− Register readback of CC, WSS (CGMS), VPS/PDC, VITC, and Gemstar 1×/2× sliced data 

• I2C host port interface 

• Reduced power consumption: 1.8-V digital core, 3.3-V for digital I/O, and 1.8-V analog core with power-save and power-down modes 

• 80-terminal TQFP PowerPADTM package

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