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  Technology
Intro to DiiVA
Driving the Home Entertainment Architecture    

Consumers around the globe are using more electronic entertainment devices and consuming more digital content than ever before. Yet a major frustration building among them is the inconsistent user experience and difficulty of finding the content they most want to enjoy as they navigate across different devices. Consumers want more applications, more interaction and more control over their content and devices. And they long for an easy way to access content across their three primary screens (TV, PC, and mobile).

Consumer Electronics (CE) manufacturers are attempting to introduce products that provide these value-added features. However, a big hurdle is the home entertainment networking technology associated with these devices. In an attempt to deliver the interactive features desired by consumers, manufacturers must contend with multiple technologies: a multimedia cable for video & audio (HDMI), a networking interface (Ethernet) and a point-to-point data interface (USB). For both consumers and CE manufacturers this combination is difficult to manage and still falls short of the apps-driven, interactive entertainment experience today’s sophisticated consumers have come to expect.

The Digital Interactive Interface for Video & Audio™ (DiiVA™) was created to offer a new home entertainment networking solution that integrates entertainment content in multiple data formats into a single cable. Uncompressed video, audio, USB, Ethernet, device control, content protection, power delivery and content management are coordinated throughout the DiiVA network by middleware and the value-add, cross-platform applications it enables. As a result, DiiVA streamlines and simplifies the entertainment experience in the home.

DiiVA’s networking protocol and middleware API coupled with its enormous bandwidth and bi-directional data channel allow users to access content on any DiiVA network device for playback on any DiiVA TV — enabling mobile, PC and CE networks to converge and communicate within a home and establish a personal domain that provides for the flexible yet secure distribution and playback of content.



  Navigation Comparison

DiiVA Home Entertainment Architecture

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

DiiVA networking allows uncompressed video, multichannel audio, USB, Ethernet, content protection and commands to be sent from any source to any display in the network.

For consumers this means a single DiiVA port on their digital television is capable of connecting and controlling multiple devices on the network.

   New features enabled by DiiVA:

  • High-Definition & 3D movies on a DiiVA-equipped Blu-ray player can be accessed from any DiiVA-equipped TV in the house.

  • Video games can be played from any DiiVA-equipped TV because the USB controllers for the game can be connected directly to the USB port on the TV, instead of to the game console.

  • Mobile devices can be charged through the DiiVA connection while outputting HD audio and video and synchronizing data to any source on the DiiVA network.

  • Applications on PCs can be launched from TVs.

  • Unused devices on the network can be intelligently powered down automatically enabling power savings.

Since video, audio and data are sent simultaneously, digital TVs and other CE devices connected through DiiVA networks can offer user-friendly interactive interfaces for consumers to make viewing choices based on content thumbnails rather than the connection. 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.

DiiVA’s middleware leverages its underlying high-speed, multi-protocol, single cable networking capability to enable content to be enjoyed anywhere on the home entertainment network.

Middleware & API The software layer that turns a collection of multi-vendor, heterogeneous devices into a cohesive network, DiiVA’s middleware and API help overcome the inconsistencies in device behavior and user experience left behind by other CE protocols. Apps built on DiiVA’s middleware API are able to deliver new, connected consumer experiences that extend beyond a single device — into the home network and on into the cloud.

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 consumes about 4.5 Gbps. So DiiVA is future-ready, capable of handling video transmissions well beyond 1080p resolution, high refresh rates and 3D video.

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 4.32 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

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 as a Green Technology

Applying proven concepts to deliver power over data wires (as with telephone wires and Power over Ethernet), the DiiVA specification has provisions to send power through the cable. With four twisted pairs in a standard DiiVA cable, DiiVA can deliver a total of 5W from a single device to adapters, repeaters and mobile devices (two twisted pairs can send 2.5W of power - 500mA @5V). Power over DiiVA (PoD) can also power the DiiVA interface portion of devices in standby mode, so the DiiVA interface can remain active even when intermediate DiiVA devices are in standby.

The Power over DiiVA protocol benefits users by detecting unused devices on the network that are powered on and automatically putting them in standby mode to save energy. When a device in standby mode is selected, a command is sent through the DiiVA network to turn the device on while powering down other unused devices. This type of aggressive power management can help reduce overall power consumption of CE devices as wasted power for unused devices left on is a shared problem for households around the world.

DiiVA Home Entertainment Architecture
DiiVA Home Entertainment Architecture

DiiVA Home Architecture
DiiVA Hardware Architecture

DiiVA Cable & Connector

DiiVA works over four 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, 5 ground) in a single row. The DiiVA consortium is also working on a mobile connector which can operate with two differential pairs (1 pair for video and 1 pair for bi-directional data). The mobile profile connector will be compatible with full profile DiiVA and is capable of simultaneously transmitting uncompressed video and audio with data while receiving power.

DiiVA 1.1 Specification Overview
Chapter Title   Purpose

1

Scope

  Defines the scope and goals of the specification

2

Normative References

  Cites references to other standards necessary for implementation

3

Terms & Conventions

  Lists conventions, terms and acronyms used throughout the document

4

Overview

  Introduces key concepts of DiiVA architecture and topology

5

Physical Layer

  Details Physical Layer including the basic electrical specification

6

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

7

Link Layer – Video Link

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

8

DiiVA Command Channel

  Defines the use of Hybrid Link packets and data structures for network
  management and device management

9

Device Capabilities & Characteristics Discovery

  Defines messages and data structures for describing and determining
  device capabilities and characteristics.

10

Audio / Video
Application Layer

  Describes the methods and messages used for Audio and Video stream
  management, AV Content Protection and control of remote DiiVA devices

11

USB Application Layer

  Describes the method used by DiiVA to carry USB data and the mechanisms
  used to manage such USB connections

12

Ethernet Application Layer

  Describes the higher-level aspects of Ethernet on DiiVA

13

Power Over DiiVA

  Describes the mechanism used to deliver power through the DiiVA cable

14

Power States &
Management

  Describes power states of DiiVA subsystems, devices and links and
  the transitions between those states

15

Connectors & Cable Assemblies

  Provides a detailed specification for DiiVA cable and connector assemblies