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Technology

DiiVA for Home Multimedia Networking

DiiVA technology combines a reliable, high-speed, bi-directional data channel with an uncompressed video and audio channel. Whereas point-to-point interfaces such as USB and HDMI only contain a Physical and Link layer, the DiiVA standard combines the Physical and Link layers with additional Networking and Transport layers to make DiiVA devices network-capable for use in a personal domain.

DiiVA networking means that uncompressed video, multichannel audio, USB, Ethernet, content protection and commands can be sent from any point to any display in the network.

For consumers this means a single DiiVA port is capable of connecting and controlling multiple devices on the network.  High-Definition movies on a DiiVA-equipped DVD player can be accessed from any DiiVA-equipped TV in the house.  Video games can be played from any DiiVA-equipped TV while the USB controllers to play the game can be connected directly to the TV, instead of to the game console. 

Since video, audio and data are sent simultaneously, digital TVs and other CE devices connected through DiiVA connections can offer user-friendly interactive interfaces for consumers who make viewing choices based on desired content versus the source connection. Applications on PCs can be launched from TVs.  With DiiVA—which enables a secure home network and a personal domain—content can be securely shared between devices within the home network such as a TV, mobile phone or PC.

Technology Comparison
DiiVA Technology



Navigation

At the core of DiiVA’s technology is a high-speed, serial link I/O that runs at 4.5Gbps per differential pair. 

Uncompressed Video (1-3 lanes) - Up to three differential pairs can be used to send uncompressed video with a maximum bandwidth of 13.5 Gbps.  By comparison 1080p video at 8-bit color and 60Hz refresh is about 4.5 Gbps.  So DiiVA is future ready, capable of handling video transmissions well beyond 1080p resolution  with deep color and high refresh rates.

Hybrid Channel (1 lane) - DiiVA enables a high-speed, bi-directional hybrid data channel that can operate at over 2 Gbps in each direction simultaneously.  The link itself runs at 4.26 Gbps in a single direction and operates in half-duplex mode. 

The hybrid channel is shared among three sub-channels:

  • Bi-directional audio sub-channel
  • Command sub-channel
  • Bulk data sub-channel

All sub-channels can operate simultaneously and the DiiVA protocol includes error-checking routines to guard against data loss.  Protocols such as USB and Ethernet can be sent through the bulk data sub-channel, enabling true data sharing between devices.

DiiVA Architecture

DiiVA works over 2-4 differential pairs and is suitable to operate over a single CAT6 cable.  As a result, DiiVA keeps costs low as CAT6 has reached economies of scale through wide use by other applications.

To avoid potential confusion, the DiiVA Specification has defined a new unique connector.  The connector has 13 pins (8 signal plus 5 ground) in a single row.


   DiiVA 1.0 Specification Summary

Chapter Title Purpose

1

Introduction

Introduces DiiVA, describes the purpose and scope of this document and lists references.

2

Overview

Overview of DiiVA, lists usages, conventions, terms and acronyms used throughout the document.

3

Physical Layer

Details Physical Layer including the basic electrical specification.

4

Link Layer – Video Link

Defines the Video Link Layer, including format timings, pixel encodings, color space descriptions and corresponding requirements.

5

Link Layer – Hybrid Link

Defines the Hybrid Channel Link Layer, including all information regarding audio, command and bulk-data sub-channel data sent across the Hybrid Channel.

6

DiiVA Networking

Describes DiiVA Networking elements, including addressing, supported topologies, daisy chains and switches and device discovery and enumeration.

7

DiiVA Control Layer (DCL)

Defines Control Layer, the application layer that uses Hybrid Link Command Sub-Channel for Network Management, Device Management, Video and Audio Management and Copy Protection.

8

Device Configuration and Control

Defines DiiVA source and sink capability ROM structures required to configure and control devices.

9

Connectors and Cable Assemblies

Provides a detailed specification for DiiVA Cable and Connector Assemblies

10

Power over DiiVA (PoD)

Describes the mechanism required to deliver power through the DiiVA cable

Appendix A

DiiVA Interoperability with HDMI

Outlines basic requirements to bridge between DiiVA and HDMI.

 
 
 
   

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