4 GB or 2 GB segments, or a separate file is created for each take. The way files are named depends on capturing software. Some systems convert HDV video into proprietary intermediate format on the fly while capturing, so original format is not preserved. HDV footage can be natively edited by most non-linear editors, with real-time playback being possible on modern mainstream personal computers. Slower computers may exhibit reduced performance compared to other formats such as DV because of high resolution and interframe compression of HDV video. Editing performance can be improved by converting HDV to intermediate format prior to editing. These include various Cineform products, Edius HQ, Avid DNxHD, Apple Intermediate Codec and Apple ProRes 422, among others. Usage of an intermediate codec adds one more generation to the video, potentially degrading its quality. On another hand, an intermediate codec can reduce blockiness and fix other issues in the original video, like interlaced chroma in progressive recordings. Depending on the non-linear editing system (NLE), it is possible to minimize generation losses by editing native HDV video using straight cuts only, with no effects, and rendering back to HDV. Up to 15 frames per each cut may be re-encoded because of the long-GOP nature of HDV video. Distributing HDV video can be recorded or printed back to tape. Such tapes are often accepted by local television stations, though many organizations prefer the submissions to be delivered in higher-end format like Digital Betacam, HDCAM or D5 HD. It is also possible to record M2TS file to any media that offers enough capacity, like a DVD, external HDD drive or a memory card. For consumer use, HDV-sourced video can be delivered on a Blu-ray Disc without re-encoding, can be converted to AVCHD and delivered on an AVCHD disc, or can be downconverted to DVD-Video. Products Canon Canon entered the HDV market in September 2005, with the Canon XL H1, a professional-oriented modular camera system with interchangeable lenses, HD-SDI output, and three 1440 × 1080 ⅓" CCDs. This was the first HDV camcorder to allow 1080-line native progressive recording. In July 2006, Canon announced the handheld XH A1/XH G1 models, which use the same sensor as the XL-H1. Both models share the same body and most of the features, with the XH G1 geared towards professional multi-camera production and including connections for HD-SDI/SD-SDI Out, genlock, and time code. Later in the same year,