The Gennum Audio Cores for FPGA are highly flexible solutions for multiplexing/demultiplexing digital audio channels into and out of digital video signals.
This product consists of four cores:
- SD Multiplexer (less than 4000 logic elements)
- SD Demultiplexer (less than 4000 logic elements)
- HD Multiplexer (less than 4000 logic elements)
- HD Demultiplexer (less than 6000 logic elements)
Each core supports 48kHz audio. Audio signals with different sample rates may be sample rate converted to 48kHz before and after the audio core using audio sample rate converters.
The HD audio cores support video standards with rates of 74.25MHz or 74.25/1.001 MHz. The video should be in 20-bit format (10-bit luma, 10-bit chroma) and must be descrambled and word-aligned in compliance with SMPTE 292M prior to arriving at the HD audio core.
The SD audio cores support video standards with a rate of 27MHz. The video should be in 10-bit format (10-bit Y’CBCR) and must be descrambled and word-aligned in compliance with SMPTE 259M prior to arriving at the SD audio core.
A single multiplexer core with the default parameters (no microprocessor intervention) will replace the first two audio groups (first 8 channels). Two cores cascaded serially will replace all four audio groups (all 16 channels).
In demultiplexer mode, a single core with default parameters will extract the first two audio groups (first 8 channels). Two cores cascaded in parallel will extract all four audio groups (all 16 channels). The delay of the extracted audio is consistent across all four groups.
Approximate FPGA Resource Utilization
|
Logic Elements |
M4K blocks |
I/Os |
|
| HD Demux |
5,855 |
15 |
41 |
| SD Demux |
3,930 |
14 |
41 |
| HD Mux |
3,729 |
18 |
62 |
| SD Mux |
3,792 |
8 |
61 |
| All Four Cores |
17,306 |
55 |
80* |
* The four cores have many I/Os in common
|
