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4.20.28. PrmOptLatPktsTx (PLR Optimal Latency)
Description: The PrmOptLatPktsTx parameter defines the amount of Packet Loss Recovery (PLR) latency (delay) that can be introduced by defining the number of frames that can be buffered. While the number of frames to be buffered should be set as high as possible for best quality, too high a value will add unnecessary latency to the system. Generally, the number of frames buffered should be the same size or slightly larger than the number of frames per packet.
The Packet Loss Recovery module attempts to restore packets arriving at the receive end as close as possible to their original time-stamped positions. Arriving packets are decomposed into individual frames, each with a unique time stamp.
Each new frame is then stored in an elastic buffer before sending it to the decoder. This is done to allow packets arriving out of order to be inserted in the queue in the correct order. The size of this elastic buffer is defined by the number of frames stored and is controlled by both the PrmOptLatPktsTx parameter and the PrmMaxLatPktsTx parameter.
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