RTP Payload Format for ISO/IEC 21122 (JPEG XS RFC 9134)
RTP payload packetization modes for IP Media worflows & VSF TR08
JPEG XS有效载荷中的两种RTP打包模式被标准化，为实现者提供了更多的灵活性。编码流模式和基于切片模式。
A main difference is that the "Codestream mode" is sending the coded data in a raster scan order while the "Slice-based mode" enable to send the coded in a non-sequential transmission.
intoPIX and VSF TR08 recommend to apply (by default) the "Codestream packetization mode" for XS RTP payload. While it is offering the lowest latency of XS coding & decoding in all implementations: FPGA , CPU & GPU, the codestream packetisation mode offers also the following benefits:
- 在JPEG-XS中保持恒定的比特率编码（帧以下的几行延迟），在JPEG-XS中实现了更高的编码质量和效率。
- RTP（ST 2110-22）和MPEG2-TS（ST 2022-2）之间的直接重映射（无延迟惩罚），无需解析码流。
- RTP（ST2110-22）和MXF之间的直接重映射（无延迟惩罚），不需要解析码流的解析
In contrary : the Slice-based packetization mode might be recommended in case of a non-sequential transmission of the codestream. It might create a drawback in interoperability - causing other latency penalties in workflows, but might reduce the latency in the particular usage of some GPU. (This non-sequential benefits has not/never been proven and is difficult to make interoperable with hardware (FPGA) and CPU (ARM/x86_64) implementations
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