GTS HDMI IP User Guide

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ID 823533
Date 5/30/2025
Public
Document Table of Contents
Document Table of Contents x
1. GTS HDMI IP Quick Reference 2. About the GTS HDMI IP 3. GTS HDMI IP Getting Started 4. GTS HDMI IP Hardware Design Examples 5. HDMI Source 6. HDMI Sink 7. Transceiver Handling (HDMI Wrapper = HDMI and Transceiver) 8. GTS HDMI IP Parameters 9. HDMI Simulation Example 10. GTS HDMI IP User Guide Archives 11. Document Revision History for the GTS HDMI IP User Guide
1. GTS HDMI IP Quick Reference x
1.1. Terms and Acronyms
2. About the GTS HDMI IP x
2.1. GTS HDMI IP Device Family Support 2.2. GTS HDMI IP Device Feature Support 2.3. GTS HDMI IP Release Information 2.4. GTS HDMI IP Performance and Resource Usage
3. GTS HDMI IP Getting Started x
3.1. Installing and Licensing IP Cores 3.2. Specifying IP Parameters and Options
3.1. Installing and Licensing IP Cores x
3.1.1. Intel FPGA IP Evaluation Mode
5. HDMI Source x
5.1. Source Functional Description 5.2. Source Interfaces 5.3. Source Clock Tree 5.4. Valid Video Data 5.5. Source Deep Color Implementation
5.1. Source Functional Description x
5.1.1. Source Scrambler, TMDS/TERC4 Encoder 5.1.2. Source Video Resampler 5.1.3. Source Window of Opportunity Generator 5.1.4. Source Auxiliary Packet Encoder 5.1.5. Source Auxiliary Packet Generators 5.1.6. Source Auxiliary Data Path Multiplexers 5.1.7. Source Auxiliary Control Port 5.1.8. Source Audio Encoder 5.1.9. TX Core-PHY Interface 5.1.10. I2C Controller
5.1.7. Source Auxiliary Control Port x
5.1.7.1. Source General Control Packet (GCP) 5.1.7.2. Source Auxiliary Video Information (AVI) InfoFrame Bit-Fields 5.1.7.3. Source HDMI Vendor Specific InfoFrame (VSI)
5.1.8. Source Audio Encoder x
5.1.8.1. Audio InfoFrame (AI) Bundle Bit-Fields 5.1.8.2. Audio Metadata Bundle Bit-Fields
5.1.9. TX Core-PHY Interface x
5.1.9.1. TX Oversampler 5.1.9.2. Clock Enable Generator
6. HDMI Sink x
6.1. Sink Functional Description 6.2. Sink Interfaces 6.3. Sink Clock Tree 6.4. Sink Deep Color Implementation
6.1. Sink Functional Description x
6.1.1. Sink Word Alignment and Channel Deskew 6.1.2. Sink Descrambler, TMDS/TERC4 Decoder 6.1.3. Sink Auxiliary Decoder 6.1.4. Sink Auxiliary Packet Capture 6.1.5. Sink Video Resampler 6.1.6. Sink Auxiliary Data Port 6.1.7. Sink Audio Decoder 6.1.8. Status and Control Data Channel (SCDC) Interface 6.1.9. RX Core-PHY Interface 6.1.10. I2C Target 6.1.11. I2C and EDID RAM Blocks
6.1.6. Sink Auxiliary Data Port x
6.1.6.1. Sink General Control Packet (GCP) 6.1.6.2. Sink Auxiliary Video Information (AVI) InfoFrame Bit-Fields 6.1.6.3. Sink HDMI Vendor Specific InfoFrame (VSI)
6.1.7. Sink Audio Decoder x
6.1.7.1. Audio InfoFrame (AI) Bundle Bit-Fields 6.1.7.2. Audio Metadata Bundle Bit-Fields
6.1.9. RX Core-PHY Interface x
6.1.9.1. RX Oversampler
7. Transceiver Handling (HDMI Wrapper = HDMI and Transceiver) x
7.1. HDMI RX with Integrated Transceiver 7.2. HDMI TX with Integrated Transceiver 7.3. Creating Dual Simplex Groups
8. GTS HDMI IP Parameters x
8.1. HDMI Source Parameters 8.2. HDMI Sink Parameters
9. HDMI Simulation Example x
9.1. Simulation Walkthrough
1. GTS HDMI IP Quick Reference
2. About the GTS HDMI IP
3. GTS HDMI IP Getting Started
4. GTS HDMI IP Hardware Design Examples
5. HDMI Source
6. HDMI Sink
7. Transceiver Handling (HDMI Wrapper = HDMI and Transceiver)
8. GTS HDMI IP Parameters
9. HDMI Simulation Example
10. GTS HDMI IP User Guide Archives
11. Document Revision History for the GTS HDMI IP User Guide

6.1.5. Sink Video Resampler

The video resampler consists of a gearbox and a dual-clock FIFO (DCFIFO).
The gearbox converts 8-bpc data to 8-, 10-, 12- or 16-bpc data based on the current color depth. The GCP conveys the color depth (bpp) information.
Figure 34. Sink Resampler Signal Flow Diagram
The resampler adheres to the recommended phase count method described in HDMI 1.4b Specification Section 6.5.
  • To keep the source and sink resamples synchronized, the source must send the packing-phase (pp) value to the sink during the vertical blanking phase, using the general control packet.
  • The pp corresponds to the phase of the last pixel in the last active video line.
  • The phase-counter logic compares its own pp value to the pp value received in the general control packet and slips the phase count if the two pp values do not agree.
The output from the resampler is fixed at 16 bpc. When the resampler operates in lower color depths, the low order bits are zero. The pixel data output format across the color space are described in the following figures in Source Video Resampler:
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