TS is a common file format for streaming video. It is used to store video images on DVD discs. Playback is possible using a variety of DVD players and tools that edit the video. In TS format, video compression is performed using MEPG-2. This is the video codec standard (.MPEG). TS files (or Video Transport Stream File) are stored on a DVD. Their structure consists of several separate files: "moviename 1.ts", "moviename 2.ts", etc. They can be played back by software that is designed to play DVDs. Video editors are also suitable for this. In order to broadcast HDTV (high-definition television), the TS format is also used, which is specially designed taking into account that the signal reception capabilities may change. TS format provides the ability to correct errors if the signal is weak. If you compare with other formats, it also better synchronizes the video stream. TS is designed to store and transmit audio, data and video in ATSC and DVB systems. TS files can be reformatted to .QPH files using the conversion utility provided with Nokia Qt SDK. Compared to TS, files with the extension QPH can be used for more applications. TS and QPH files are stored in XML format.
ALAC is the format of a small specialized program called an audio codec. Its main task is to compress a file with digital music without losing its quality. The name of the format created by Apple's IT giant is Apple's abbreviation Lossless Audio Codec. This format may also be called ALE (from Apple Lossless Encoder). Files in this format can play devices even with limited computing resources - such as an iPod. When compressing a file in this format, it is approximately 40-60% of the original file. Now almost every multimedia player based on the libavcodec library is able to play ALAC format files.