Description

The TW9903AAMB electronic component is a high quality NTSC, PAL, and SECAM video decoder plus high quality downscaler designed for multimedia applications. It utilizes mixed-signal 3.3V CMOS technology to provide a low-cost and low-power integrated solution. With its integrated analog front-end containing AGC, clamping, and three 8-bit high-speed ADCs, the TW9903AAMB requires minimum external components. It features an adaptive comb filter and luma/chroma processing for composite inputs, resulting in exceptionally high-quality pictures. The component also includes a high-quality internal scaling engine that offers arbitrarily filtered downscaling of the output picture. It supports a built-in Closed-Caption decoder and VBI data pass-through, making it suitable for data applications such as Closed-Captioning and IntercastÔ.

Specifications and features

• Analog Video Decoder:
  • NTSC (M, 4.34) and PAL (B, D, G, H, I, M, N, N combination), PAL (60), SECAM with automatic format detection
  • Advanced synchronization processing for VCR fast forward, backward, and pause mode
  • Software selectable analog inputs allowing various combinations such as up to four composite video inputs or three composite and one S-video input
  • Two 8-bit ADCs and analog clamping circuit
  • Fully programmable static gain or automatic gain control for the Y or CVBS channel
  • Programmable white peak control for the Y or CVBS channel
• Video processing:
  • Switchable Notch or 2H comb filter Y/C separation
  • PAL delay line for color phase error correction
  • Image enhancement with programmable peaking
  • Digital sub-carrier PLL for accurate color decoding
  • Digital Horizontal PLL and advanced synchronization processing for non-standard video signals
  • Programmable hue, brightness, saturation, and contrast
  • Automatic color control and color killer
  • High-quality horizontal and vertical filtered scaling with arbitrary scale down ratio
  • Detection of level of copy protection according to Macrovision standard
• Video Output:
  • Programmable output cropping
  • VMI 1.4 compatible 8-bit or 16-bit pixel interface
  • ITU-R 601 or ITU-R 656 compatible output YCbCr(4:2:2) output format
  • Closed caption decoding
  • VBI data pass-through, raw ADC data for Intercast™
• Miscellaneous:
  • Two-wire MPU serial bus interface
  • Power-down mode
  • Typical power consumption of 0.4W
  • Single 27MHz crystal for all standards
  • Supports 24.54MHz and 29.5MHz crystal for high-resolution square pixel format
  • 5V tolerant I/O
  • 3.3V power supply
  • 100-pin PQFP package

Application Scenarios

The TW9903AAMB electronic component is suitable for a wide range of multimedia applications that require high-quality video decoding and downscaling. It can be used in devices such as DVD players, video game consoles, digital cameras, and set-top boxes. With its support for NTSC, PAL, and SECAM formats, it can handle different video standards from various regions. Its integrated analog front-end and advanced video processing capabilities ensure exceptional picture quality, making it ideal for applications where image clarity is crucial. The TW9903AAMB also supports data applications like Closed-Captioning and IntercastÔ, expanding its potential uses in multimedia systems.

Comparison

• High quality NTSC, PAL, and SECAM video decoding
• Low-cost and low-power integrated solution
• Requires minimum external components
• Exceptionally high-quality pictures with adaptive comb filter and luma/chroma processing
• Built-in Closed-Caption decoder and VBI data pass-through support
• Flexible analog input options
• Programmable static gain and white peak control
• Advanced video processing features for accurate color decoding and image enhancement
• High-quality horizontal and vertical scaling with arbitrary scale down ratio
• Support for multiple video output formats
• Wide range of compatible crystal options

• Only supports 3.3V power supply
• Requires a 100-pin PQFP package