UG-707
ADV8005 Hardware Reference Manual
svsp_fieldbuffer6_addr[31:0]
, Secondary VSP Map,
Address 0xE66C[7:0]; Address 0xE66D[7:0]; Address 0xE66E[7:0]; Address 0xE66F[7:0]
This signal is used to set the start address of field/frame buffer 6. Software should arrange memory space properly, avoiding conflict between
different buffers.'
Function
svsp_fieldbuffer6_addr[31:0]
Description
0x00000000
Default
0xXXXXXXXX
Start address of frame buffer 6
3.3.1.5.
Frame Latency
Depending on the format being input to the
and the output required from the SVSP, different resolutions will have different frame
latencies. This is due to the increased processing required on scaling different types of video data. This has a certain impact in that the audio
will have to be delayed by the same amount.
lists frame latencies in different cases for various resolutions.
Table 30: Frame Latency in Normal Mode
Output
Input
Frame Rate 50 Hz
59.94/60 Hz
23.97/24 Hz 25/30 Hz
Frame Rate
Timing
576p/720p/1080
p
480p/720p/1080p 720p/1080p 720p/1080p
50 Hz
576p
720p
1080p
0.1~1.3
1, 2
0.1~1.3
0.1~1.4
0.1~1.4
59.94/60 Hz
480p
720p
1080p
0.1~1.3
0.1~1.3
0.1~1.4
0.1~1.4
23.97/24/25/30Hz
720/1080p 0.1~0.8
0.1~0.8
0.1~1.3
0.1~1.3
1. x.x means x.x times the input video frame
2. A~B means frame latency is not a fixed value, it varies between A and B
When crop or album mode is enabled, frame latency will be different from that listed in
. In this case, the user can use the following
controls to measure frame latency:
and
are read only registers. Their values are real-
time frame and HSync latency between input and output video.
Frame latency may vary within a range; the
readback register indicates the maximum frame latency, while
indicates the minimum frame latency. If
is set to 0, svsp_rb_max_latency[14:0] and
, SVSP monitors values in
and
and then records the maximum and minimum values of them in the
registers
which are both 15 bits wide. The highest three bits are the frame latency and the lower 12 bits are the HSync
latency. Users should note that it will take several seconds for the SVSP to find the maximum and minimum frame/HSync latency.
In a normal case (not game mode), the SVSP’s input video and output video latency is consistent.
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