Audio Input Stream Interface - Audio Input Stream Interface - 1.2 English - PG350

HDMI 2.1 Transmitter Subsystem v1.2 Product Guide (PG350)
Document ID
PG350
Release Date
2025-08-26
Version
1.2 English

The following table shows the signals for AXI4-Stream audio streaming interfaces. The audio interface transports 24-bits L-PCM or 16-bits HBR audio samples in the IEC 60958 format. A maximum of 32 channels are supported. The audio interface is a 32-bit AXI4-Stream slave interface and runs at the s_axis_audio_aclk clock rate.

Table 1. Audio Input Stream Interface
Name I/O Width Description
s_axis_audio_aclk I 1 Clock (The audio streaming clock must be greater than or equal or greater than 128 times the audio sample frequency)
s_axis_audio_aresetn I 1 Reset (Active-Low)
AUDIO_IN_tdata I 32 Data
  • [31] P (Parity)
  • [30] C (Channel status)
  • [29] U (User bit)
  • [28] V (Validity bit)
  • [27:4] Audio sample word (L-PCM) (Option 1)
  • [27:12] Audio sample word (HBR), [11:4] are ignored for HBR audio (Option 2)
  • [3:0] Preamble code
  • 4'b0001 Subframe 1/Left Channel and start of audio block
  • 4'b0010 Subframe 1/Left Channel
  • 4'b0011 Subframe 2/Right Channel
AUDIO_IN_tid I 5 Channel ID
AUDIO_IN_tready O 1 Ready
AUDIO_IN_tvalid I 1 Valid