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Tektronix provides test and measurement instruments, solutions and services for the computer, semiconductor, military/aerospace, consumer electronics and education industries worldwide.
A form of block distortion where one or more blocks in the received image bear no resemblance to the current or previous scene and often contrast greatly with adjacent blocks.
Industry:Entertainment
a) A technique used when error correction fails (see Error Correction). Erroneous data is replaced by data synthesized from surrounding pixels. b) When the error correction program discovers in the reproduced signal, an error too extensive to permit reconstruction, the redundancy in most image information makes it possible for error concealment to make the error nearly inobvious. Video images are frequently nearly identical from frame to frame. Adjacent video lines frequently have almost the same detail. It becomes possible, therefore, when a “burst error” involving the modification or loss of many recorded bits occurs, to determine from image segments adjacent in time or in space, a most probable substitution. Such substitutions, when infrequent and supported by the image redundancy, are often accepted by the viewers as “correct.” (This is a degree of freedom in image data recording that obviously is not available to scientific and financial data recording. The additional information needed by the algorithm for decision and substitution is usually provided by a datastorage cache established during reproduction.
Industry:Entertainment
a) Coding schemes incorporated into the information before it is transmitted (or stored) in such a way that errors which may arise in transmission can be detected and corrected before restoration or retrieval. In PCM systems, error correction effectively improves the SNR of the system. b) Ingenious software programs make it possible to check that the digital stream of image information has not been corrupted by the loss of a few bits here and there. Additional information introduced as “overhead” to the image bit stream (thereby increasing the bit rate, recording) is chosen to conform to specific rules of construction.
Departures from this construction can be detected readily, so that many potential errors can not only be identified, but corrected so that the information can be restored with high probability. Error correction contributes to the reliability of recording/reproducing and is a normal part of all data recording.
Industry:Entertainment
Proposed SMPTE RP-165 for recognizing inaccuracies in the serial digital signal. It may be incorporated into serial digital equipment and employ a simple LED error indicator.
Industry:Entertainment
The actual program (audio, video, and/or data) without metadata.
Essence could also be graphics, telemetry, photographs, or other information.
Industry:Entertainment
a) A type of high-speed network for interconnecting computing devices. Ethernet can be either 10 or 100 Mbps (Fast Ethernet). Ethernet is a trademark of Xerox Corporation, Inc. b) A type of local area network that enables real-time communication between machines connected directly together through cables. A widely implemented network from which the IEEE 802.3 standard for contention networks was developed, Ethernet uses a bus topology (configuration) and relies on the form of access known as CSMA/CD to regulate traffic on the main communication line. Network nodes are connected by coaxial cable (in either of two varieties) or by twisted-pair wiring.
Industry:Entertainment
A massive European research effort, sometimes called the European version of Star Wars, embracing many separate R&D projects, including semiconductors, telecommunications, and computers. The Eureka EU-95 project is about ATV systems for 625 scanning line/50 field per second countries.
Industry:Entertainment
EPU is a body that coordinates national platforms in Europe for widescreen TV and the migration to HDTV.
EPU seeks to promote and to coordinate knowledge about widescreen TV, embracing broadcasting, medicine, corporate, and cinema use. EPU emphasizes digital aspects and the migration to HDTV, but not necessarily 1250-line HDTV. Through the EPU, the national platforms may exchange experience, facts, and views.
Industry:Entertainment
Equipment that evaluates physical and magnetic quality of tape, usually provided as an adjunct to a winder/cleaner. In contrast to a certifier, it does not stop when it detects an error.
Industry:Entertainment
