Products

LSI

What is GVIF ?

GVIF is a high speed serial video interface developed by Sony.
It allows high quality digital transmission over a single shielded pair interface between digital data source devices and display.
GVIF can support various types of AV equipment.

Examples of car use and navigation-display connection examples

Technology

GVIF基本技術説明

Characteristic of the GVIF/GVIF2 Transmission

  • Transmit serialized data of up to 4.8Gbps by using either a STP cable or a coaxial cable.
  • Adapt SFTCLK frequency in accordance with the panel resolution automatically.
  • Full Duplex
  • Content Protection technology (HDCP)
  • Audio data transmission
  • Daisy-chain transmissions of multiplexed video/audio sources
Cross-section photo of HDMI and GVIF

Adaptive Equalizer

Explanation of Adaptive Equalizer

The ideal waveform can be reproduced, regardless of the cable length and attenuation rate, by monitoring the amplitude of the equalized waveform. In addition, attenuated signals can be corrected by passing the signals through an AGC circuit at the receiving end.

Adaptive Equalizer Eye Diagram

Adaptive equalizer eliminates gain adjustments depending on cable length
Data Rate 4.8Gbps
Cable
Length
2m 10m
Before
Equalize
Waveform before cable equalization with cable length of 2m Waveform before cable equalization with cable length of 10m
After
Equalize
Waveform after cable equalization with cable length of 2m Waveform after cable equalization with cable length of 10m

Frequency Negotiation

Explanation of Frequency Negotiation: The transmitter sends the reference clock based on the request from the receiver.

High Noise Tolerance, Low Noise Radiation

High Noise Tolerance

The GVIF LSI has a circuit configuration that is resistant to clock jitter and power supply noise in consideration of multi-stage use such as repeater connection.

  • FIFO circuit in the clock input stage is for loading externally input video
  • All LSI internal circuits, through which high-speed signals pass, are differential circuits.

Low Noise Radiation

GVIF has achieved test results that satisfy Class 5 grade stipulated by the CISPR 25 Ed. 3.0: 2008 standard "Vehicles, boats and internal combustion engines - Radio disturbance characteristics - Limits and methods of measurement for the protection of on-board receivers" created by the International Special Committee on Radio Interference (CISPR: Comite International Special des Perturbations Radioelectriques).

Graph of Radiation Noise Level Examples of GVIF2 Noise Radiation Data w/STP Cable 4.8Gbps
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