Pixel Repetition - Analog Devices ADV8003 Hardware Manual

Function
aux_vic_detected[2:0]
000 
001
010
011
100
101
110
111
aspect_ratio, TX2 Main Map, Address 0xF417[1]
This bit is used to set the aspect ratio of input video. This bit is used to distinguish between CEA-861D video timing codes where aspect
ratio is the only difference.
Function
aspect_ratio
0 
1
progressive_mode_info[1:0], TX2 Main Map, Address 0xF43F[4:3] (Read Only)
This bit is used to specify additional information for 240p or 288p input formats.
Function
progressive_mode_info
[1:0]
00 
01
10
11

6.10.3. Pixel Repetition

Pixel repetition is used in HDMI to increase the amount of blanking period available to send packets or to increase the pixel clock to meet
the minimum TMDS clock rate of 25 MHz. The ADV8003 offers three choices for the user to implement pixel repetition in the Tx core.
These choices or modes are described below and can be set via pr_mode[1:0]:
Automatic mode: In automatic mode, the ADV8003 uses the audio sampling rate and the detected VIC information as parameters to
decide if pixel repetition is needed to obtain sufficient blanking periods to send the audio. For an I2S input stream, the sampling rate is
always set by the user via the
the audio_sampling_freq_sel
different from the VIC sent to the downstream sink. The VIC of the actual video sent across the HDMI link to the downstream sink, and
which is included in the AVI InfoFrame, can be read from the
Manual mode: In the manual pixel repetition mode, the VIC sent in the AVI InfoFrame needs to be set. The factor between the pixel
clock input to the Tx core and the output TMDS clock frequency must be programmed in the
repetition value sent to the HDMI sink must be programmed in pr_value_manual[1:0]. Refer to the latest HDMI specification for more
details on valid pixel repetition formats.
Max mode: The max mode works in the same way as the automatic mode, except that it always selects the highest pixel repetition factor
the Tx core is capable of. This makes the video timing independent of the audio sampling rate. This mode is not typically used.
Rev. B, August 2013
Description
Set by register 0x3E
240p not active
576i not active
288p not active
480i active
240p active
576i active
288p active
Description
4:3
16:9
Description
Reserved
262 total lines per frame for 240p and 312 total lines per frame for 288p
263 total lines per frame for 240p and 313 total lines per frame for 288p
Reserved for 240p and 314 total lines per frame for 288p
i2s_sf[3:0] field. In the case of an SPDIF stream, the source of the audio sampling rate information is set via
bit. If the pixel repetition factor is adjusted to meet bandwidth requirements, the detected input VIC may be
vic_to_rx[5:0] field.
255
ADV8003 Hardware Manual
pr_pll_manual[1:0] field. The pixel