Audio Codec; Main Features Of Adv7850; Analog Front End; Hdmi Receiver - Analog Devices ADV7850 Hardware Manual

rates. The data extracted can be read back over the I

2.5 AUDIO CODEC

The ADV7850 contains a 24-bit, 48 kHz stereo CODEC. The stereo audio ADC converts analog audio inputs and provides the data to the
back end via the HDMI interface. The stereo audio DAC receives I
The audio output is available as both high impedance and driver output which is suitable for direct headphone connection.

2.6 MAIN FEATURES OF ADV7850

Analog Front End

2.6.1
The analog front-end functionality includes:
• 170 MHz 12-bit ADCs enabling true 12-bit video decoding
•
13 analog input channel mux enabling multisource connection without the requirement of an external mux
• Two analog output options for SCART connectivity
• Voltage clamp control loops ensuring any DC offsets are removed from the video signal
• Digital PLL design delivering ultra low sampling jitter for the digitizer

HDMI Receiver

2.6.2
• HDMI 1.4 compatible receiver
ARC support

3D video support including Frame packing for all 3D formats up to a 225 MHz TMDS clock and/or up a pixel clock of

148.5 MHz
Full colorimetry support including SYCC601, Adobe RGB, and Adobe YCC601

Advanced audio features

•
HDCP v1.3 compliant receiver
• Fast switching between HDMI ports (XpressView support)
•
Supports deep color
• Supports all display resolutions up to UXGA (1600 x 1200 at 60 Hz)
• HBR, DSD, and PCM formats are supported with a sampling frequency up to 192 kHz
• Programmable front end equalization for HDMI operation over cable lengths up to 30 meters
• Audio mute for removing extraneous noises
• Programmable interrupt generator to detect HDMI packets
• Internal EDID support

Composite and S-Video Processing

2.6.3
• Advanced adaptive 3D comb with concurrent Frame TBC using external DDR2 SDRAM memory
•
Adaptive 2D 5-line comb filters for NTSC and PAL that give superior chrominance and luminance separation for composite
video
• Full automatic detection and autoswitching of all worldwide standards (PAL, NTSC, and SECAM)
• Automatic gain control with white peak mode that ensures the video is always processed without loss of the video processing
range
•
Proprietary architecture for locking to weak, noisy, and unstable sources from VCRs and tuners
• IF filter block that compensates for high frequency luma attenuation due to the tuner saw filter
•
LTI and CTI for PAL, NTSC and SECAM
• Simultaneous CVBS and HDMI audio processing
•
Vertical and horizontal programmable luma peaking filters
• 4× oversampling for CVBS, and S-Video modes
• Line-locked clock output (LLC)
• Free run output mode that provides stable timing when no video input is present
• Internal color bar test pattern
• Advanced TBC with frame synchronization, which ensures nominal clock and data for nonstandard input
Rev. A May 2012
C interface or ancillary data stream.
2
S data from the back end and converts it to an analog audio output.
2
17
ADV7850