描述 Description

General description
The 9-bit video input processor is a combination of a two-channel analog preprocessing circuit including source selection, anti-aliasing filter and ADC, an automatic clamp and gain control, a Clock Generation Circuit (CGC), a digital multistandard decoder (PAL BGHI, PAL M, PAL N, combination PAL N, NTSC M, NTSC-Japan, NTSC N and SECAM), a brightness, contrast and saturation control circuit, a multistandard VBI data slicer and a 27 MHz VBI data bypass.
The pure 3.3 V CMOS circuit SAF7113H, analog front-end and digital video decoder, is a highly integrated circuit for desktop video applications. The decoder is based on the principle of line-locked clock decoding and is able to decode the color of PAL, SECAM and NTSC signals into ITU-R BT 601 compatible color component values. The SAF7113H accepts as analog inputs CVBS or S-video (Y/C) from TV or VTR sources. The circuit is I2C-bus controlled.The integrated high performance multistandard data slicer supports several VBI data standards:
? Teletext 625 lines: WST (World Standard Teletext) and CCST (Chinese teletext)
? Teletext 525 lines: US-WST, NABTS (North-American Broadcast Text System) and
?? MOJI (Japanese teletext)
? Closed caption: Europe and US (line 21)
? Wide Screen Signalling (WSS)
? Video Programming Signal (VPS)
? Time codes (VITC EBU/SMPTE)
? High-speed VBI data bypass for Intercast application.

特性 Features

■ Four analog inputs, internal analog source selectors, e.g. 4 × CVBS or 2 × Y/C or
?? (1 × Y/C and 2 × CVBS)
■ Two analog preprocessing channels in differential CMOS style for best
?? S/N-performance
■ Fully programmable static gain or automatic gain control for the selected CVBS or Y/C
?? channel
■ Switchable white peak control
■ Two built-in analog anti-aliasing filters
■ Two 9-bit video CMOS Analog-to-Digital Converters (ADCs), digitized CVBS or
?? Y/C-signals are available on the VPO-port via I2C-bus control
■ On-chip clock generator
■ Line-locked system clock frequencies
■ Digital PLL for horizontal sync processing and clock generation, horizontal and vertical
?? sync detection
■ Requires only one crystal (24.576 MHz) for all standards
■ Automatic detection of 50 Hz and 60 Hz field frequency and automatic switching
?? between PAL and NTSC standards
■ Luminance and chrominance signal processing for PAL BGHI, PAL N,
?? combination PAL N, PAL M, NTSC M, NTSC N, NTSC 4.43, NTSC-Japan and SECAM
■ User programmable luminance peaking or aperture correction
■ Cross-color reduction for NTSC by chrominance comb filtering
■ PAL delay line for correcting PAL phase errors
■ Brightness Contrast Saturation (BCS) and hue control on-chip
■ Real-time status information output (RTCO)
■ Two multifunctional real-time output pins controlled by I2C-bus
■ Multistandard VBI data slicer decoding World Standard Teletext (WST),
?? North-American Broadcast Text System (NABTS), closed caption, Wide Screen
?? Signalling (WSS), Video Programming System (VPS), Vertical Interval Time Code
?? (VITC) variants (EBU/SMPTE), etc.
■ Standard ITU-R BT 656 YUV 4 : 2 : 2 format (8-bit) on VPO output bus
■ Enhanced ITU-R BT 656 output format on VPO output bus containing:
?? ◆ Active video
?? ◆ Raw CVBS data for Intercast applications (27 MHz data rate)
?? ◆ Decoded VBI data
■ Boundary scan test circuit complies with the “IEEE Std. 1149.b1 - 1994”
?? (ID-Code = 1 7113 02B)
■ I2C-bus controlled (full read-back ability by an external controller and bit rate up to
?? 400 kbit/s)
■ Low power (< 0.5 W), low voltage (3.3 V), small package (QFP44)
■ Power saving mode by chip enable input
■ Detection of copy protected input signals according to the Macrovision standard; can
?? be used to prevent unauthorized recording of pay-TV or video tape signals.Applications
■ Notebook (low power consumption)
■ PCMCIA card application
■ AGP based graphics cards
■ Image processing
■ Video phone applications
■ Intercast and PC teletext applications
■ Security applications.

應(yīng)用 Application

■ Notebook (low power consumption)
■ PCMCIA card application
■ AGP based graphics cards
■ Image processing
■ Video phone applications
■ Intercast and PC teletext applications
■ Security applications.