SDI Decoder Statistics
The following tables list the SDI 1 and SDI 2 Decoder statistics:
Statistic | Description/Values |
---|---|
Statistics | |
Up Time | The length of time the decoder is actively decoding (e.g., 5d22h15m25s). |
Restarts | The number of times the decoder was internally restarted due to a change in encoded stream parameters (resolution and/or frame rate) or because of excessive errors in the stream. |
Video Decoder | |
Algorithm | The compression algorithm detected in the decoded stream, either:
|
Profile | The application profile class for the incoming video stream:
|
Level | The required level of decoder performance to be able to process the incoming video stream:
|
State | The current operating status of the decoder, either:
|
Buffering Mode | The type of buffering used. |
MultiSync Delay | The delay in ms from timecode stamping at the encoder to display when buffering in MultiSync mode. |
MultiSync Status | An indication of whether or not MultiSync buffering is working properly. May provide helpful information on what is missing (e.g., "Timecode is NOT PRESENT"). |
MultiSync Delay Set | An indication of whether or not the MultiSync delay setting is within the acceptable range. (See "MultiSync Delay Range" below) |
MultiSync Delay Range | The range of values within which the MultiSync delay must lie. |
(Input) Format | The input signal detected from the encoder. |
Bitrate | The bitrate for the decoded video. |
Decoded Frames | The number of decoded video frames. Tip Video frames are complete pictures sent in a cascade for display at a distinct point in time. See "Decoded Frames" under "Audio Decoder & Output". |
Skipped Frames | The number of frames that were not sent to the video decoder. |
Statistic | Description/Values |
---|---|
(Output) Format | The output signal sent from the decoder. |
Output Frames | The number of video frames output from the decoder. |
Skipped Frames | Skipped frames occur when the time to play a video frame has already passed when the decoder is finished producing a new video frame. In this case, the video frame is dropped (never displayed) and it is counted as skipped. The decoder does this to minimize the latency and maintain audio/video sync. The most likely reason for this to occur is that the video is complex and takes more time to decode than is expected by the decoder. |
Replayed Frames | A replay frame occurs when the same video frame is played twice in a row on a decoder output. It occurs when the decoder is too slow to produce a video frame and there is nothing else to display. In this case, the decoder will replay the last frame played. Conditions such as network congestion and packet loss, complex video scenes, and the decoder attempting to minimize latency can all cause replay frames. Tip If the Replayed Frames statistic increments periodically and video playback is not smooth, we recommend that you try running the decoder using Fixed mode with a delay added of up to 2000ms of buffering, or less as playback quality permits. This should take care of most non-congestion related skip/replay situations. |
Display Errors | The number of display errors. |
Statistic | Description/Values |
---|---|
Algorithm | The audio compression algorithm, either:
Note Any AC-3 audio received will be down-mixed to a stereo pair for output on the HDMI and SDI interfaces. The two channels of AES3 data are output within the SMPTE 272/299 embedded audio ancillary packets of the SDI HANC space. |
State | The current operating status of the decoder, either:
|
Bitrate | The bitrate for the decoded audio. |
Sample Rate | The number of audio samples per second taken from the output signal. 48 kHz only. |
Number of Pairs | The number of audio channel streams played as surround sound over the HDMI interface. |
Input Layout 1 | The stream's channel configuration as received and decoded. This statistic reports what the channel configuration was before the down-mixing and/or resampling step. |
Decoded Frames | The number of decoded audio frames. Tip Audio frames are same-sized groups of audio samples to be played back. See "Decoded Frames" under "Statistics & Video Decoder". |
Audio Output | |
Output Frames | The number of audio frames output. |
Output Layout | The audio output layout on the SDI/HDMI interface. It is always 2.0: stereo (Front Left and Front Right). Note If the Input Layout is mono, it will be mixed to stereo as the output. |
Skipped Frames | The number of skipped audio frames. |