Texas Instruments TVP5147M1PFP - Manual (Page 9)

Introduction
1 SLES140A—March 2007 TVP5147M1PFP
1 Introduction
The TVP5147M1 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 TVP5147M1 decoder supports the
analog-to-digital (A/D) conversion of component 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 two 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 YPbPr, CVBS, or S-video video
inputs.
Composite or S-video signals are sampled at 2 × the ITU-R BT.601 clock frequency, line-locked alignment, and
are then decimated to the 1
×
pixel rate. CVBS decoding uses 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 I
2 C host port interface. Furthermore, luma peaking (sharpness) with
programmable gain is included, as well as a patented chroma transient improvement (CTI) circuit.
The following output formats can be selected: 20-bit 4:2:2 YCbCr or 10-bit 4:2:2 YCbCr.
The TVP5147M1 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 TVP5147M1 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 TVP5147M1 decoder can pass through the output formatter 2
×
sampled raw luma data for host-based VBI processing.
The main blocks of the TVP5147M1 decoder include:
• Robust sync detection for weak and noisy signals as well as VCR trick modes
•
Y/C separation by 2-D 5-line adaptive comb or chroma trap filter
•
Two 10-bit, 30-MSPS A/D converters with analog preprocessors [clamp and automatic gain control
(AGC)]
•
Analog video output
• Luminance processor
•
Chrominance processor
•
Clock/timing processor and power-down control
•
Software-controlled power-saving standby mode
• Output formatter
•
I 2 C host port interface
•
VBI data processor
• Macrovision  copy protection detection circuit (Type 1, 2, 3, and separate color stripe detection)
•
3.3-V tolerant digital I/O ports
Macrovision is a trademark of Macrovision Corporation.
Other trademarks are the property of their respective owners.