Ericsson AVP 4000, Справочное руководство, Страница: 171 / 422

Front Panel Control
1/1553-FGC 101 1790 Uen Y 4-31
Buffer Mode CBR, Seamless, Fast Channel Zap, Capped VBR. Sets a buffer mode to adapt
to changing bit rates and ensure interruption is not caused in the output
stream.
Video Bit Rate
The valid bit rate range depends on the selected video profile. Defines the bit
rate to be used by the compressed video component. If Bit Rate Tracking
Mode is set to Maximize Video for the Transport Stream that contains the video
component, and the Bit Rate Weighting of the component is set to other than
Fixed or Minimal, this field is read only.
Look Ahead
Aspect Ratio 16:9, 4:3. Does not affect the video encoding but rather indicates what the
desired aspect ratio for the decoded picture (not the pixel). If no other
mechanism such as WSS in the VBI is used, the video output image will use
this aspect ratio.
GOP Length 25/29.97Hz 4 to 250. Defines the nominal distance in steps of video frames between two
consecutive I frames in the encoded bit-stream. Only present if HD Auto Input
Detection is not Off.
GOP Length 50/59.94Hz 4 to 250. Defines the nominal distance in steps of video frames between two
consecutive I frames in the encoded bit-stream. Only present if HD Auto Input
Detection is not Off.
GOP Length 4 to 250. Defines the nominal distance in steps of video frames between two
consecutive I frames in the encoded bit-stream. Only present if HD Auto Input
Detection is Off.
GOP Structure IP, IBP, IBBP, IBBBP, IBBBBBBBP. Sets the number of B frames between
reference frames. IBBBBBBBP can only be used for 720p video format
encoded with a H.264 video profile.
Closed GOPs Off, On. Enables or disables the usage of Group of Pictures in which the
predicted frames can have their reference from outside the group.
Scene Cut Detection
On, Off. When enabled, minimizes the negative effect the scene changes have
on the bit rate by inserting an I-Frame when a change is detected. It also
affects the GOP length.
Delay Displays the actual video encoding delay. Read only parameter.
Stills Detection Off, On. Detects if the video is a still picture, and adjusts the encoded video bit
rate accordingly when operating in VBR mode.
Premium Functionality Off, On. Enable premium functions. License controlled feature.
Inloop Filter High, Normal, Low, Very Low, Auto. Sets the characteristics of the filter placed
in the feedback loop of the encoder. Applying the filter to the picture can
increase picture sharpness.
SEI Encapsulation Mode
Combined, Mediaroom. Sets the SEI messages in combined mode where all
the SEI messages are combines into one NAL unit or into Mediaroom mode
compliance where each SEI message has its own NAL start.
Splicing
Splicing Control Off, On VANC Message Only, On VANC, On IP. Enables splice points to be
set in the video stream upon reception of a SCTE 104 message and
determines the insertion point. To enable splicing, a splice point insertion
license (AVP/SWO/DPI) is needed.
Splice Null Insertion Off, On. Used to determine the insertion of NULL SCTE 35 messages into the
output stream if no messages have been sent for 500ms.
Audio Splicing Off, On. Used to determine if audio is manipulated at the point that the video
splice occurs.