Delay modes

Contribution decoding delay modes (latency)

The modes described here are used to configure decoding delay, or latency of the Contribution decoder. The delay modes affect the delay between the PCR/PTS relationship and delaying picture display (when compared to the system clock reference).

Delay modes:

• Standard: This is the default value. Standard mode allows using all encoders, in all modes.
• Low: This is the recommended setting for most contribution link use cases. You can also use this mode in any context where a low delay is required.
• Super Low: This is the recommended setting for simple contribution links when using TS input with SDI output where the lowest delay is required.

Low delay and Super Low delay modes have been designed and tested with MK.IO Beam encoders to ensure an optimized error-free minimum end-to-end delay. Post-processing operations in the receiver such as video scaling or HDR/SDR conversion will add to the overall processing time and may not be compatible with these delay modes.

If a problem occurs trying to decode a valid input transport stream, please try the Standard delay mode before raising a support request.

Info: Additional input processing, such as descrambling or SMPTE ST 2022-7 input, increases overall latency across all delay modes in the Receiver service.

Setting delay mode

1. From the Home page, select the RECEIVER item from the required feed then click Edit.

2. Open the Decoding tab in the Parameters window.

3. Select a Delay mode.

4. Click Save and Continue to apply change.

Considerations when using Super Low delay mode

• Super Low delay mode is only guaranteed to work with the MK.IO Beam encoder. The encoder configuration needs to be optimized for use with Super Low delay mode.
• 1080i25/29.97 inputs are not supported with Super Low delay mode.
• Dolby Digital decode requires approximately 15ms of additional processing time which will extend the delay when Super Low delay mode is selected.
  Dolby Digital passthrough is not affected.