Originally Posted by paidgeek
I think the term CLV is a antiquated as it was used to define how LD, and CED read analog video data from a disc. In consider this term a misnomer since we are not reading data from the disc in real time, but rather picking up packets of data at faster than real time.
CLV was never intended to refer to the rate an application consumed data from the disc. C
elocity deals with velocity, and velocity is a physical quantity of an object's motion. In this case the relative velocity of pits in a plastic substrate relative to a optical pickup unit.
Therefore CLV refers to the relationship of the channel bits on the disc and the activity of the drive when reading these bits. Even modern Blu-ray drives read discs at a constant velocity, no matter what rate the video application requests data. In other words, the rate you request data (packets or not) does not generally change the disc velocity the drive uses to to retrieve that data. This is true if the drive reads the disc in CLV or CAV mode.
that a Blu-ray disc is manufactured to a precise CLV specification. This manufacturing takes no account of the rate the application will consume the data.
CLV is not the only type of velocity used on optical discs. C
elocity (CAV) recording may be seen near the inner hub as human readable text and machine readable barcodes. (Indeed, the BCA barcode is important for BD-ROM video discs.) Z
elocity recording may be seen in formats that are designed for very fast random access such as DVD-RAM, HD DVD-RAM, UDO, MO, and hard drives.