Sorenson codec may refer to either of three proprietary video codecs: Sorenson Video, Sorenson Video 3 or Sorenson Spark. Sorenson Video is also known as Sorenson Video Codec, Sorenson Video Quantizer or SVQ. Sorenson Spark is also known as Sorenson H.263 or FLV1 (and it is sometimes incorrectly named as Flash Video (FLV), which is the name of Adobe Flash container format).
Both codecs were devised by Sorenson Media Inc. (formerly Sorenson Vision Inc.). Sorenson Video is used in Apple's QuickTime and Sorenson Spark in Adobe Flash (formerly Macromedia Flash).