Table of Contents
Advertisement
7.3.1. Setting the Coarse Audio Delay
Audio Control
ADLY
FDLY
0 to Max
7.3.2. Setting the Fine Audio Delay
Audio Control
ASDL
-33ms to +33ms
0
7.3.3. Setting the SRC Mode
Audio Control
SRC
Bypass
BYPS
Enable
ON
Automatic
AUTO
7772MFX-HD JPEG2000 SD & HD Encoder and Decoder
This control adjusts the audio delay in terms of video frames (coarsely).
The delay is respective of the input video. The range of the parameter
is based on the operating standard of the module, since this parameter
follows the video frame phase.
When FDLY is selected then the audio delay is the same as the frame
delay (see section 7.2.3).
Otherwise, the user can insert a delay of 0 to max video frames, and
the range depends on the operating video standard:
•
If the video is interlaced, the value should be mapped to
'FollowVideoDelay',0,1,2,...,12;
•
If the video is progressive, the value should be mapped to
'FollowVideoDelay',0,2,4,...,24;
The default value should be 0 (following video frame delay).
This control adjusts the audio delay (finely). This parameter is displayed
in milliseconds and adjusted in approximate sample increments
(approximately 20.83µs).
If ADLY is set to 0, then the parameter range is 0 to 33ms.
Otherwise, fine audio delay ranges from –33ms to +33ms.
This sets the bypass mode of the audio sample rate converter.
When Enabled, audio is sample rate converted at 48 kHz, which is
synchronous to the input video. Audio can be either synchronous or
asynchronous to the video source.
When in Bypass mode, the content of the audio is preserved without any
loss, and directly embedded into the input video.
synchronous to the video source. If not, there may be samples that are
dropped or repeated.
When set to Automatic, the sample rate converter will be automatically
enabled when the module detects a PCM signal.
Revision 1.2
7700 MultiFrame Manual
Audio must be
7772MFX-HD - 25
Advertisement
Table of Contents
