
SAA7118; Multistandard video decoder with adaptive comb filter and component video input
Features
Video acquisition/clock
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Up to sixteen analog CVBS, split as desired (all of the CVBS inputs optionally can be used to convert e.g. Vestigial Side Band (VSB) signals)
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Up to eight analog Y + C inputs, split as desired
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Up to four analog component inputs, with embedded or separate sync, split as desired
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Four on-chip anti-aliasing filters in front of the Analog-to-Digital Converters (ADCs)
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Automatic Clamp Control (ACC) for CVBS, Y and C (or VSB) and component signals
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Switchable white peak control
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Four 9-bit low noise CMOS ADCs running at twice the oversampling rate (27 MHz)
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Fully programmable static gain or Automatic Gain Control (AGC), matching to the particular signal properties
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On-chip line-locked clock generation in accordance with ?ITU 601?
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Requires only one crystal (32.11 or 24.576 MHz) for all standards
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Horizontal and vertical sync detection.
Video decoder
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Digital PLL for synchronization and clock generation from all standards and non-standard video sources e.g. consumer grade VTR
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Automatic detection of any supported colour standard
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Luminance and chrominance signal processing for PAL B, G, D, H, I and N, combination PAL N, PAL M, NTSC M, NTSC-Japan, NTSC 4.43 and SECAM
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Adaptive 2/4-line comb filter for two dimensional chrominance/luminance separation, also with VTR signals
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Increased luminance and chrominance bandwidth for all PAL and NTSC standards
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Reduced cross colour and cross luminance artefacts
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PAL delay line for correcting PAL phase errors
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Brightness Contrast Saturation (BCS) adjustment, separately for composite and baseband signals
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User programmable sharpness control
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Detection of copy-protected signals according to the Macrovision(1) standard, indicating level of protection
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Independent gain and offset adjustment for raw data path
Component video processing
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RGB component inputs
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Y-PB-PR component inputs
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Fast blanking between CVBS and synchronous component inputs
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Digital RGB to Y-CB-CR matrix.
Video scaler
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Horizontal and vertical downscaling and upscaling to randomly sized windows
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Horizontal and vertical scaling range: variable zoom to 1/64 (icon) (it should be noted that the H and V zoom are restricted by the transfer data rates)
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Anti-alias and accumulating filter for horizontal scaling
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Vertical scaling with linear phase interpolation and accumulating filter for anti-aliasing (6-bit phase accuracy)
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Horizontal phase correct up and downscaling for improved signal quality of scaled data, especially for compression and video phone applications, with 6-bit phase accuracy (1.2
ns step width)
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Two independent programming sets for scaler part, to define two 'ranges' per field or sequences over frames
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Fieldwise switching between decoder part and expansion port (X port) input
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Brightness, contrast and saturation controls for scaled outputs.
Vertical Blanking Interval (VBI) data decoder and slicer
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Versatile VBI data decoder, slicer, clock regeneration and byte synchronization e.g. for World Standard Teletext (WST), North American Broadcast Text System (NABTS),
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