Sharp 32LF-94EC, Руководство по обслуживанию, Страница: 47 / 82

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AK53 D.O.C. Service Manual 22/03/2004
• Decoding and adaptive de-emphasis for satellite FM (ASTRA)
• Monitor selection for FM/AM DC values and signals, with peak detection option
• Soft-mute for DEMDEC outputs DEC, MONO and SAP
• Sample rate conversion (SRC) for up to three demodulated terrestrial audio signals. It is possible to
process SCART signals together with demodulated terrestrial signals. Up to five signals (stereo
counting for 2) can be processed at a time.
Audio Processing
• Virtual Dolby® (‘422’ mode and ‘423’ mode) (3)
• Bass management
• Dynamic Bass Boost (4)
Automatic volume levelling (AVL)
• Programmable Level Adjust at inputs of switch matrix
• Volume control:
–
Separate volume control on headphone
• Balance control on left/right speaker and on left/right headphone by use of trim control
• 5-band graphic equalizer or treble/bass control
• Notch filter for acoustic compensation
• Soft mute on all outputs
• Beeper
• Pseudo Hall/Matrix:
– Pseudo Hall provides (L+R)/2 on Centre and (L+R)/2 with 30ms delay on Surround
– Pseudo Matrix provides (L+R)/2 on Centre and (L-R)/2 with 30ms delay on Surround
Character Based Graphics
• Characters Based Display:
– 1440 pixels per line of which 5% in over-scan.
• Level 1.5 WST TeleText compliant
• Double Window TeleText display:
– Display of two 40 character wide Level 1.5 TeleText pages side by side.
– Display of 40 character wide Level 1.5 TeleText and Video side by side.
• Line 21 Data Services compliant
• Supports OSD with up to 8 colors out of a palette of 4096 colors
• Selectable character size
• Dynamically Redefinable Characters (DRCs)
– Internal memory up to 64 characters
RGB Processing
• Fully programmable YCrCb to RGB matrix
• Saturation control done using matrix
• Contrast and brightness control with 8 bits resolution
• D/A converters for RGB and Scan Velocity Modulation:
– Clock frequency 81MHz (fixed)
– Sample Rate Conversion to convert from orthogonal pixels
– 10 bits resolution (11 bits virtual using dithering of LSB)
– 2160 interpolated pixels per line
• 1440 pixels per line (of which 5% in over scan) at graphics blender (clock frequency 54 MHz)
• Forced super blanking during start-up or fault conditions
• Programmable horizontal and vertical retrace blanking via line and pixel number
• Separate beam current control on video and graphics
• Peak White limiter for video path
• Soft clipping for video path
• Hard clipping for graphics path
• Advanced Scan Velocity Processing:
– Scan Velocity modulation working on both Video and Graphics
– Dynamic contrast
• Continuous Cathode Calibration (=cut off control):
– System allows both for one-point and two-point calibration
• Graphics/video blender with mixture level (0% to 100% in 16 steps)