1.1 Features

· Four Separate Video Decoder Channels With

Features for Each Channel:

– Accept NTSC (M, 4.43), PAL (B, D, G, H, I,

M, N), and SECAM (B, D, G, K, K1, L) Video

Data

– Support ITU-R BT.601 Standard Sampling

– High-Speed 9-Bit Analog-to-Digital

Converter (ADC)

– Two Composite Inputs or One S-video Input

(for Each Channel)

– Fully Differential CMOS Analog

Preprocessing Channels With Clamping

and Automatic Gain Control (AGC) for Best

Signal to Noise (SNR) Performance

– Brightness, Contrast, Saturation, Hue, and

Sharpness Control Through Inter-Integrated

Circuit (I2C)

– Complementary 4-Line (3-H Delay) Adaptive

Comb Filters for Both Cross-Luminance

and Cross-Chrominance Noise Reduction

– Patented Architecture for Locking to Weak,

Noisy, or Unstable Signals

· Four Independent Polymorphic Scalers

· Single or Concurrent Scaled and Unscaled

Outputs Via Dual Clocking Data, Interleaved

54-MHz Data or Single 27-MHz Clock

· Scaled/Unscaled Image Toggle Mode Gives

Variable Field Rate for Both Scaled and

Unscaled Video

· Low Power Consumption: 700 mW Typical

· 128-Pin Thin Quad Flat Pack (TQFP) Package

· Single 14.31818-MHz Crystal for All Standards

and All Channels

· Internal Phase-Locked Loop (PLL) for

Line-Locked Clock (Separate for Each

Channel) and Sampling

· Sub-Carrier Genlock Output for Synchronizing

Color Sub-Carrier of External Encoder

· Standard Programmable Video Output Format

– ITU-R BT.656, 8-Bit 4:2:2 With Embedded

Syncs

– 8-Bit 4:2:2 With Discrete Syncs

· Advanced Programmable Video Output

Formats

– 2′ Over-Sampled Raw Vertical Blanking

Interval (VBI) Data During Active Video

– Sliced VBI Data During Horizontal Blanking

or Active Video

· VBI Modes Supported:

– Teletext (NABTS, WST)

– Closed-Caption Decode With FIFO, and

Extended Data Services (EDS)

– Wide Screen Signaling (WSS), Video

Program System (VPS), Copy Generation

Management System (CGMS), Vertical

Interval Time Code (VITC)

– Gemstar 1′/2′ Electronic Program Guide

Compatible Mode

– Custom Configuration Mode Allows User to Program the Slice Engine for Unique VBI

Data Signals

· Improved Fast Lock Mode Can Be Used When

Input Video Standard Is Known and Signals on

Switching Channels Are Clean

· Four Possible I2C Addresses Allowing 16

Decoder Channels on a Single I2C Bus

1.2 Applications

· The following is a partial list of suggested applications:

– Security Camera Systems

– Large Format Video Wall Displays

– Games Systems

1.3 Description

The TVP5154 device is a 4-channel, low-power, NTSC/PAL/SECAM video decoder. Available in a

space-saving 128-pin thin quad flat pack (TQFP) package, each channel of the TVP5154 decoder

converts NTSC, PAL, or SECAM video signals to 8-bit ITU-R BT.656 format. Discrete syncs are also

available. All four channels of the TVP5154 are independently controllable. The decoders share one

crystal for all channels and for all supported standards. The TVP5154 can be programmed using a single

inter-integrated circuit (I2C) serial interface. The decoder uses a 1.8-V supply for its analog and digital

supplies, and a 3.3-V supply for its I/O. The optimized architecture of the TVP5154 decoder allows for low

power consumption. The decoder consumes less than 720 mW of power in typical operation.

Each channel of the TVP5154 is an independent video decoder with a programmable polymorphic scaler.

Each channel converts baseband analog video into digital YCbCr 4:2:2 component video, which can then

be scaled down to any resolution to 1/256 vertical and 15-bit horizontal in 2-pixel decrements. Composite

and S-video inputs are supported. Each channel includes one 9-bit analog-to-digital converter (ADC) with

2′ sampling. Sampling is ITU-R BT.601 (27.0) MHz, generated from a single 14.31818-MHz crystal or

oscillator input) and is line locked. The output formats can be 8-bit 4:2:2 with discrete syncs or 8-bit ITU-R

BT.656 with embedded synchronization.

The TVP5154 utilizes Texas Instruments patented technology for locking to weak, noisy, or unstable

signals. A real-time control (RTC) output is generated for each channel for synchronizing downstream

video encoders.

Complementary 4-line adaptive comb filtering is available per channel for both the luma and chroma data

paths to reduce both cross-luma and cross-chroma artifacts. A chroma trap filter also is available.

An improved fast lock mode can be used when the input video standard is known and the signals on the

switching channels are clean. Note, switching from snow and/or noisy channels to good channels takes

longer. In fast lock mode, video lock is achieved in three fields or less.

Video characteristics, including hue, contrast, brightness, saturation, and sharpness, may be

independently programmed for each channel using the industry standard I2C serial interface. The

TVP5154 generates synchronization, blanking, lock, and clock signals in addition to digital video outputs

for each channel. The TVP5154 includes methods for advanced vertical blanking interval (VBI) data

retrieval. The VBI data processor slices, parses, and performs error checking on teletext, closed caption,

and other data in several formats.

I2C commands can be sent to one or more decoder cores simultaneously, reducing the amount of I2C

activity necessary to configure each core. A register controls which decoder core receives I2C commands,

and can be configured such that all four decoders receive commands at the same time.

The main blocks for each of the channels of the TVP5154 decoder include:

· Robust sync detector

· ADC with analog processor

· Y/C separation using 4-line adaptive comb filter

· Independent, concurrent scaler outputs

· Chrominance processor

· Luminance processor

· Video clock/timing processor and power-down control

· I2C interface

· VBI data processor