For HDMI

Hdmi is one of the specifications of the HDMI connector. is the specification of consumer electronics control, which can be translated as "consumer electronics product control" in Chinese 」.

According to mingsiyi, The hdmi is an AV link provided by the industrial specifications. It is connected to multiple AV devices through the HDMI interface, you can use a single volume controller to control the data.

The hdmi is a single-core middleware that distributes streams to the serial column. In the HDMI 1.0 specification, the middleware is created and updated in version 1.2a.

 

The bus, known as the Consumer Electronics Control () bus, is the basis for a new level of Automatic Control in HDMI-interfaced systems. with the recent release of a compliance test specification and specified cial test equipment, consumer electronic companies are now running ed to implement  in their products. in fact, new products are expected to begin shipping in logs l 2006.

The basic technology of the  bus originated in Europe, on the scart interface, where it's been used with great success for policyears. HDMI borrows and improves on the basic scart technology, allowing AV Products to discover and communicate with one another pair ss a system. makes possible global controls, which build on existing point-topoint e-DDC-based "Plug & Play" automation to minimize the number of IR Remotes and key-presses required for basic operation of a system.

 assumes that all AV source products in a system are directly or indirectly connected to a "root" display. HDMI Connections form an upside-down tree, with a display as the "root", switches as "branches", and various source products as "leaf" nodes. for example, allows users to connect a mix of AV Products, place a DVD into the player, press play, and let handle the rest.

will automatically power-on the appropriate products, route the dvdplayer's audio output through the AVR to attached speakers, and route the player's motion picture to the digital TV. likewise, selecting a channel on the set-top-box will cause television audio to replace movie audio on the speakers and a TV picture to replace the motion picture on the digital TV. further, pressing the record button on the recording device will cause the television program on the "root" to be automatically routed to and recorded on that device. in short, Enables automatic equipment discovery and simple "One touch" Operation in HDMI-interfaced systems.

The bus is a one-wire, "Party line" that connects up to ten (10) Av devices through standard HDMI cabling. the protocol provided des automatic mechanisms for physical address (topology) discovery, (product type based) logical addressing, arbitration, retransmission, broadcasting, and routing control. message Opcodes support both device specific (e.g. set-Top-box, DTV, and player) and general features (e.g. for power, signal routing, remote control pass-through, and on-screen display ).

 

The  in HDMI has 14 Functions (optional)

3 feature Overview

provides a number of recommended features designed to enhance the functionality and

Interoperability of devices within an HDMI system. This section gives an overview of these

Features.

• One touch play-allows a device to be played and become the active source with a single

Button press.

• System standby-enables the user to switch all devices to standby with one button press.

• Preset transfer-enables any tuner device to download the same set of presets as the TV.

It is used to auto configure a devices presets so no manual setup is required.

• One Touch record-offers a what you see is what you record (wysiwyr) facility,

Meaning that whatever is shown on the TV screen is recorded on a selected recording

Device.

• Timer programming-allows a device (e.g. The TV) to set a timer recording on a recording

Device.

• System Information-queries the system to determine device addresses and deployments

(E.g. Language and country)

• Deck control-enables a device to control (e.g. Play, fast forward etc.) and interrogate

Playback Device (a deck ).

• Tuner control-allows a device to control the tuner of another device.

• Vendor Specific commands-allows a set of vendor-defined commands to be used

Between devices of that vendor.

• OSD display-enables a device to use the on-screen display of the TV to display text

Strings.

• Device Menu Control-enables a device to control the menu of another device by passing

Through user interface commands.

• Routing control-allows the control of switches for streaming of A New Source Device.

• Remote Control pass through-enables remote control commands to be passed through

To other devices within the system.

• Device OSD name transfer-enables devices to upload their preferred OSD name to

TV. The TV can then use this name in any menus associated with that device.