LG BH100 Training Manual page 11

HDMI AUDIO
The HDMI interface's ability to transmit audio distinguishes it from other connection formats. This
aspect allows users to connect devices using a single cable, bypassing the confusing "spider web" of
cables often found behind home theater systems. HDMI supports high-bandwidth uncompressed
digital audio and all currently-available compressed formats (such as Dolby Digital and DTS). In
addition, the 1.3 revision of HDMI adds supports for new, lossless compressed digital audio formats
Dolby TrueHD and DTS-HD.
HDMI COMMUNICATION
Since the HDMI interface extends the I2C Bus, vast communication aspects are available. One of the
most often used communications on HDMI is HDCP authentication. HDCP implementations for
HDMI adhere to HDCP specification 1.10. HDCP is designed for protecting Audiovisual content over
high-bandwidth interfaces (HDMI and DVI) from being copied. Without copy-protection establishment
and verification, most programming will not be displayed at high resolutions. It is for this reason,
and the fact that Component Video cannot pass copy-protection, that HDMI is such a valuable
interface.
Once HDCP is established, EDID information is transmitted via the HDMI interface. EDID includes
data outlining a Display Device's capabilities that is interpreted by the Source. The source device
will then automatically adjust to the capabilities of the Display. For example, if a Display Device can
support 720p but not 1080i, the source device will set to 720p and remove 1080i as an option.
Consumer Electronics Control (CEC) is an optional protocol used in HDMI systems that allows HDMI
devices to pass control functions along to all devices within the system. CEC was designed to
operate at low speeds with minimal processing and memory overhead.
The following is a set of all the features offered with CEC. Devices may use all or only some of these
features, depending upon functionality.
One Touch Play – A device may be played and become the active source by the press of a
single button.
System Standby – Enables devices to be set on standby by the press of a single button.
Preset Transfer – A device's presets can be auto-configured to match those of the TV.
One Touch Record – Allows recordings to be made by the press of a single button.
Timer Programming – Any device can program a time recording on a recording device.
System Information – allows devices to auto-configure their language and country settings.
Deck Control – Allows a device to control and interrogate a playback device.
Tuner Control – Allows a device to control the tuner of another device.
Vendor Specific Commands – Allows vendor-defined commands to be used.
OSD Display – Allows a device to display text using the on-screen display of the TV.
Device Menu Control – Allows a device to control the menu of another device.
Routing Control – Enables control of CEC Switches for streaming of a new source device.
Remote Control Pass Through – Allows Remote Control commands to be passed along to other
devices within the system.
Device OSD Name Transfer – Devices may request the preferred OSD name of other devices
within the system.
BH100 Blu-ray Player
11
OVERVIEW
Overview