Definição do conceito
[POR] MPEG IMX | MPEG IMX (2001-2016) : É uma evolução do formato Betacam Digital, no qual é utilizado o sistema de compressão MPEG, mas com um bitrate maior do que o Betacam SX. | FONTE : Betacam. in: Wikipedia. Disponível em : https://pt.wikipedia.org/wiki/Betacam Acesso em : 18 nov. 2022
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[SPA] MPEG IMX | MPEG IMX es una variante del Betacam creada en 2001. Utiliza, al igual que Betacam SX, una compresión MPEG, pero con un bitrate superior. Comparte la norma CCIR 601, con hasta ocho canales de audio y una pista de código de tiempo. Carece de una pista analógica de control track como el Betacam Digital, pero puede usar la pista 7 de audio para este cometido. | Es un sistema de vídeo por componentes comprimido con el MPEG-2 4:2:2P@ML. Permite tres niveles de bitrate distintos: 30 Mb/s (compresión 6:1), 40 Mb/s (compresión 4:1) y 50 Mb/s (compresión 3,3:1). | Con los magnetoscopios IMX, Sony introdujo dos nuevas tecnologías: SDTI y e-VTR. SDTI permite que vídeo, audio, TC y control remoto viajen por un solo cable coaxial. e-VTR hace que los mismo datos puedan ser trasmitidos por IP a través de una conexión ethernet. Existen dos tipos de tarjetas, la 2000 y la 3000 (la última permite transferir también un proxy). La transferencia es a dos veces el tiempo real para los contenidos grabados en IMX y transfiere (en IMX 30 o 50) en tiempo real para el resto de materiales de media pulgada (Betacam/SP, SX, DB). También incluye la función good shot mark de Beta SX. Las cintas de tamaño S graban hasta 60 minutos y las de tamaño L, hasta 184 minutos. | MPEG IMX usa cartuchos de color verde. El formato también forma parte de la gama XDCAM, y puede grabar en Professional Disc, una especificación de Blu-ray Disc para vídeo broadcast. | FUENTE : Betacam. in: Wikipedia. Disponible en : https://es.wikipedia.org/wiki/Betacam Acceso en : 18 nov. 2022.
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[ENG] MPEG IMX | MPEG IMX is a 2001 development of the Digital Betacam format. Digital video compression uses H.262/MPEG-2 Part 2 encoding at a higher bitrate than Betacam SX: 30 Mbit/s (6:1 compression), 40 Mbit/s (4:1 compression) or 50 Mbit/s (3.3:1 compression). Unlike most other MPEG-2 implementations, IMX uses intraframe compression. Additionally, IMX ensures that each frame has the same exact size in bytes to simplify recording onto video tape. Video recorded in the IMX format is compliant with CCIR 601 specification, with eight channels of audio and timecode track. It lacks an analog audio (cue) track as the Digital Betacam, but will read it as channel 7 if used for playback. This format has been standardized in SMPTE 365M and SMPTE 356M as "MPEG D10 Streaming". | With its IMX VTRs, Sony introduced some new technologies including SDTI and e-VTR. SDTI allows for audio, video, timecode, and remote control functions to be transported by a single coaxial cable, while e-VTR technology extends this by allowing the same data to be transported over IP by way of an ethernet interface on the VTR itself. | All IMX VTRs can natively playback Betacam SX tapes, and some, such as the MSW-M2000P/1 are capable of playing back Digital Betacam cassettes as well as analog Betacam and Betacam SP cassettes, but they can only record to their native IMX cassettes. S tapes are available with up to 60 minutes capacity, and L tapes hold up to 184 minutes. These values are for 525/60 decks, but will extend in 625/50. A 184-minute tape will record for, as the label itself specifies, 220 minutes. | IMX machines feature the same good shot mark function of the Betacam SX. | MPEG IMX cassettes are a muted green. | The XDCAM format, unveiled in 2003, allows recording of MPEG IMX video in MXF container onto Professional Disc. | SOURCE : Betacam. in: Wikipedia. Available at : https://en.wikipedia.org/wiki/Betacam Accessed : 18 nov. 2022.
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[ENG] MPEG IMX | MPEG IMX (2001 – 2016) | MPEG IMX (also known as D-10) was a standard-definition digital video cassette format introduced by Sony in 2001 and was part of the Betacam family of professional video formats. It was priced between Sony’s Betacam SX and the more expensive Digital Betacam, and was intended to compete with the Panasonic DVCPRO50 system. As the name suggests, MPEG IMX recorded in MPEG video format, in case MPEG-2 using only I-frames and 8 channel audio. | Like other Betacam formats, tape width was ½ inch and cassettes were available in small or large form factors, with the S size holding up to 60 minutes of video, and the L size up to 184 minutes. To distinguish MPEG IMX tapes from other Betacam formats, the shells were coloured green. Metal particle tape was used. | All IMX video recorders could playback Betacam SX tapes, and some could playback Digital Betacam as well as analogue Betacam and Betacam SP tapes, the video from which could be encoded into MPEG-2 format. Only IMX tapes could be used for recording in IMX video recorders. | Like all Betacam formats, no new MPEG IMX video recorders are being made, having been discontinued in 2016. | Dimensions (S-size): 15.6 cm × 9.6 cm × 2.5 cm | Dimensions (L-size): 25.4 cm × 14.5 cm × 2.5 cm | MUSEUM OF OBSOLETE MEDIA. Data Base. Available at : https://obsoletemedia.org/mpeg-imx/ Accessed : 24 nov. 2022
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