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 multi-standard 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 multi-standard VBI data slicer and a 27 MHz VBI data bypass; see Fig.1.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 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-colour 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 multi functional real-time output pins controlled by
?? I2C-bus
? Multi-standard 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 656 YUV 4 : 2 : 2 format (8-bit) on VPO
?? output bus
? Enhanced ITU 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, bit rate up to 400 kbits/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.

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 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-colour 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 multi functional real-time output pins controlled by
?? I2C-bus
? Multi-standard 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 656 YUV 4 : 2 : 2 format (8-bit) on VPO
?? output bus
? Enhanced ITU 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, bit rate up to 400 kbits/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.

應(yīng)用 Application

(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, bit rate up to 400 kbits/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.