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Video and Audio Compression
Published in Wes Simpson, Video Over IP, 2013
Three main video applications have been implemented using Motion JPEG:Motion JPEG-2000 has been selected as the standard compression format by the Digital Cinema Initiative group. This standard applies to both 2 K (2048 × 1080) and 4 K (4096 × 2160) images for use in digital projection in cinemas.A number of video-editing systems have in the past used Motion JPEG as an intermediate format, because of the relative simplicity of editing these video streams. However, this format has become less popular in recent years, because more efficient coding methods have been introduced.A number of video transport links using Motion JPEG or JPEG-2000 have been introduced at various times in the market. Several manufacturers currently offer proprietary motion JPEG- 2000 products that operate over IP networks for high-bit-rate video contribution applications.
A Review of A/V Basics
Published in Al Kovalick, Video Systems in an IT Environment, 2013
Interformats are sometimes called IBP or long GOP (group of pictures), indicating the temporal association of the compression. The IBP and GOP concepts are described in short order. Note that some I frame-only formats such as JPEG 2000 and DV use only the intramode, whereas others such as MPEG are designed for either mode. In general, interformat compressors can also work in intramode when required. JPEG2K is unique because it has modes for both still picture and video compression. When a JPEG format codes video, it is sometimes called Motion-JPEG.
Digital picture compression
Published in Steve Heath, Multimedia and Communications Technology, 1999
It must be said that JPEG coding is designed for the compression of digital still images, but the techniques it uses have formed the basis of the MPEG specifications which define compression techniques for video. In addition, Motion JPEG is also another standard for encoding video which simply relies on the standard JPEG coding to process each frame in a movie and transmit it as a continuous bitstream. In this case, the frames are independent and cannot be used to help in the encoding/decoding process — a technique that MPEG exploits to obtain higher compression ratios.
Control-based event-driven bandwidth allocation scheme for video-surveillance systems
Published in Cyber-Physical Systems, 2022
Gautham Nayak Seetanadi, Karl-Erik Årzen, Martina Maggio
The cameras in the network capture a set of frames and encode them using the chosen encoding technique (In this paper, we use Motion JPEG (MJPEG)). The images are then transmitted to the manager over a common Ethernet connection during each transmission period. Figure 2 shows an original image and an image after encoding it with a quality factor. The original frames captured by the camera consist of redundant information and are unsuitable for direct transmission. Most encoding techniques use a quality factor to encode images and reduce the amount of redundant information contained. Higher values of leads to frames of larger sizes with fewer artefacts. Motion JPEG (MJPEG) generally has quality factor bounded such that .