HD <Hard disk>

Alias:
hard disk, fixed disk, fixed disk
Field:
Storage > hard disk > HD

One of typical storage units. The magnetic substance the disk of the metal which it applied or evaporated, or (is called “[puratsuta]”) is designed to be the structure which many is superposed at fixed interval, this turning to high speed with the motor, bringing close the magnetic head, it reads and writes the data. The magnetic head and the disk in order 10nm and to approach very, are weak in the vibration. It is loaded onto most computers which begin the personal computer, the typical external memory unit. As for size of disk, as for those for notebook PC 2.5 inches, as for those for desktop personal computer 3.5 inches the respective main current. SCSI and IDE (ATA) and the like is used in connection with the computer.

HDA <HD audio>

Full spelling: High Definition Audio
Alias:
[haidehuinishiyonodeio], Intel HD Audio and the Intel HD audio
Field:
Personal computer > extended card > HDA
Personal computer > motherboard > HDA
Multimedia > sound/music > HDA

For the personal computer which the Intel corporation announces in 2004 January audio standard. Being something which is decided as succession of AC'97 standard, presently sound functional many of the personal computer have become HD audio correspondence.

With the spread and the like of DVD-Video, handling the multi channel audio of [dorubisaraundo] and the like even with the general personal computer increased, with former sound source environment correspondence had become difficult. With AC'97 sound of the 48kHz/20 bit could be handled maximum of channel 6, but with HD audio maximum of channel 8 to play back simultaneously it is possible the sound of the 192kHz/32 bit.

By the fact that fixed ratio among communications zones inside the personal computer is guaranteed in audio exclusive use, break and pop noise of sound (the noise, “[putsutsu]”) it has prevented. Method of using that is possible it corresponds to multiple streaming function, plays back CD and DVD simultaneously with 1 personal computers, outputs to the respective another equipment. In the input aspect audio input with the sound quality which corresponds to the simultaneous input of the plural channels by the array microphone, is higher than past is possible.

HD-BURN

Reading: H D burning
Field:
Storage > optical disk > CD > HD-BURN

The technology which the Sanyo Electric announced in 2002 September, makes the data logging of capacity of time possible in the existing CD-R media.

HD-BURN for DVD drive diverts portion of technology to for CD-R, assures the improvement of recording density. Reduction of the smallest pit length (from 0.83 millimicrons 0.62 millimicrons), improvement of the record performance with the modification and the like of error correcting code system was assured, it became possible to record 1.4GB to the CD-R media which has the capacity of 700MB.

HD-BURN has an eye on value differential of the CD-R media and the DVD-R/+R media where cost reduction advances, uses the existing CD-R media and is observed as the media which can record medium capacity cheaply

HDCP

Reading: The h D sea tweet
Full spelling: High-bandwidth Digital Content Protection system
Field:
Security > right protection > HDCP

From image playback equipment such as personal computer the route which the digital signal sending and receiving is done is encoded in the indicatory equipment of display and the like, one of the copyright protective technology which prevents the fact that the contents are copied illegitimately. It is used for encoding the digital interface of DVI and HDMI etc. With the system the Intel corporation and the like developing, Digital Content Protection and LLC have managed the license.

With DVD and digital television broadcasting and the like as for the image data being protected by cryptographic technology, extracting the data simply and drawing up the copy, it is designed in such a way that it cannot play back, but it was played back with the personal computer and the like and the case where it is forwarded in display code was solved and from the fact that it becomes “defenseless”, you aimed for this instant and extracted image from transmission system, it felt concern that the pirate copy is drawn up.

HDD

Reading: H D D
Full spelling: Hard Disk Drive
Field:
Storage > hard disk > HDD

Reader of hard disk. The hard disk the disk and the reader having unified, because it is installation and removal impossible, is used as synonym of the hard disk.