An International Telecommunications Union (ITU) standard that provides specification for computers, equipment, and services for multimedia communication over packet based networks that defines how real-time audio, video and data information is transmitted. H.323 is commonly used in VoIP, Internet Telephony, and IP-based videoconferencing. Users can connect with other users over the Internet and use varying products that support H.323. This standard is based on the Internet Engineering Task Force (IETF) Real-Time Protocol (RTP) and Real-Time Control Protocol (RTCP), with additional protocols for call signaling, and data and audiovisual communications.
A suite of standards approved by the International Telecommunications Union (ITU) that defines videoconferencing over analog (POTS) telephone wires. One of the main components of H.324 is the V.80 protocol that specifies how modems should handle streaming audio and video data.
A high-level programming language commissioned by NASA in the 1970’s. Hal/S is a a real-time aerospace programming language that is most known for use in NASA’s Space Shuttle program. Hal/S is used in the programming of onboard shuttle software. Initially Hal/S was a FORTRAN preprocessor then called Hal that was written in FORTRAN and generated […]
- Hamming code
(ham´ing kōd) (n.) In digital data transmissions, a method of error detection and correction in which every string of four bits is replaced with a string of seven bits. The last three added bits are parity-checking bits that the receiving device uses to check for and correct any errors. Hamming code will detect any double […]
- Hardware Compatibility List
Abbreviated as HCL, the Hardware Compatibility List is a list of products maintained by Microsoft that note devices that have been tested for compatibility with Windows Vista or XP. For Windows Vista, devices that have been tested and found to provide the best experience are are marked with logos stating they are “Certified For Windows […]
(adj.) Describes any modem that recognizes Hayes modem commands. Hayes Microcomputer Products is one of the leading manufacturers of modems and has developed a language called the AT command set for controlling modems that has become the de facto standard.