Decoding
Video decoding
The Receiver services are designed to decode video, audio and data from an incoming transport stream.
In Beam, 4:2:0 / 4:2:2 SD, HD and UHD decoding are available when making use of either the Dektec 4-port or 8-port SDI output card.
Video formats and decoding standards
| Resolution | Frame rate | Bit depth | Chroma | Codec |
|---|---|---|---|---|
| 720 x 480i | 29.97 fps | 8/10 bit | 4:2:0/4:2:2 | MPEG-2 (1) H.264 H.265 |
| 704 x 480i | 29.97 fps | 8/10 bit | 4:2:0/4:2:2 | MPEG-2 (1) H.264 H.265 |
| 720 x 576i | 25 fps | 8/10 bit | 4:2:0/4:2:2 | MPEG-2 (1) H.264 H.265 |
| 704 x 576i | 25 fps | 8/10 bit | 4:2:0/4:2:2 | MPEG-2 (1) H.264 H.265 |
| 1920 x 1080i | 25/29.97 fps | 8/10 bit | 4:2:0/4:2:2 | MPEG-2 (1) H.264 H.265 JPEG-XS (2) |
| 1280 x 720p | 50/59.94 fps | 8/10 bit | 4:2:0/4:2:2 | MPEG-2 (1) H.264 H.265 JPEG-XS (2) |
| 1920 x 1080p | 50/59.94 fps | 8/10 bit | 4:2:0/4:2:2 | MPEG-2 (1) H.264 H.265 JPEG-XS (2) |
| 3840 x 2160p | 50/59.94 fps | 10 bit | 4:2:0/4:2:2 | H.265 |
(1) MPEG-2 is 8-bit only.
(2) JPEG-XS is 10-bit only.
Delay Mode
Contribution decoding delay modes (latency)
The modes described here are used to configure decoding delay, or latency of the Contribution decoder. The delay modes effect 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 current encoders, in all modes.
- Low: This is the recommended setting for simple contribution links. 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 a low delay is required.
Setting delay mode
-
From the Home page, select the RECEIVER item from the required feed then click .
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Open the Decoding tab in the Parameters window.
-
Select a Delay mode.
Low and Super Low delay modes have been designed and tested to ensure an optimized error free minimum end to end delay. If a problem occurs trying to decode a valid input transport stream, please try the Standard delay mode before raising a support request.
Configuration of decoding
Refer to the Receiver component documentation on how to configure decoding.