Standards - Xilinx HDMI 1.4 Product Manual

As a guideline, HDCP 2.2 is used to encrypt content at Ultra-High Definition (UHD) while
HDCP 1.4 is the legacy content protection scheme used at lower resolutions.
Figure 2-10 shows a configuration of the HDMI transmitter where both HDCP 1.4 and 2.2
are enabled. With both HDCP protocols enabled, the HDMI Subsystem configures itself in
the cascade topology where the HDCP 1.4 and HDCP 2.2 are connected back-to-back. The
HDCP Egress interface of the HDMI transmitter sends unencrypted audiovisual data, which
is encrypted by the active HDCP block and sent back into the HDMI transmitter over the
HDCP Ingress interface for transmission over the link. The HDMI TX Subsystem ensures that
only one of the HDCP protocols are active at any given time and the other is passive by
calling the relevant HDMI TX Subsystem API functions.
X-Ref Target - Figure 2-10
HDMI TX Subsystem
Video
(AXI4-Stream or Native)
AXI4-Stream Audio
Figure 2‐10: HDCP 1.4 and HDCP 2.2 over HDMI Transmitter
For more details on HDCP, see the HDCP v1.4 Product Guide (PG224)
Product Guide (PG249)

Standards

The HDMI 1.4/2.0 Transmitter Subsystem is compliant with the AXI4-Stream Video Protocol
and AXI4-Lite interconnect standards. See the Vivado AXI Reference Guide (UG1037)
for additional information. Also, see HDMI specifications
The HDMI TX Subsystem is compliant with the HDMI 1.4b and HDMI 2.0 specification
[Ref 12].
The Xilinx HDCP 1.4 is designed to be compatible with High-bandwidth Digital Content
Protection system Revision 1.4
HDMI 1.4/2.0 TX Subsystem
PG235 October 4, 2017
HDCP 2.2
Transmitter
(Active)
HDCP Ingress
(Encrypted)
[Ref 25].
[Ref 13].
www.xilinx.com
Chapter 2: Product Specification
HDCP 1.4
Transmitter
(Passive)
HDMI TX Core
[Ref 12].
HDCP Egress
(Unencrypted)
TMDS Link
[Ref 26] and HDCP v2.2
[Ref 1]
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