Abstract: A recording system records blocks of information on a record carrier according to a file management system. Data space on a partly and fragmented recorded record carrier (60-68) is managed as follows. The information includes a first type of information, such as video, and a second type, such a general purpose data. The first type has extent allocation requirements that include requiring an extent to accommodate a multitude of information blocks in a consecutive range of addresses and the extent to have at least a predetermined extent size. Data space is managed by selecting at least one partly recorded data area (67,63,68) of at least the extent size which data area contains information blocks (63) at recorded addresses, and subsequently creating a free data area (74) on the record carrier by moving the information blocks from the recorded addresses in the partly recorded data area to different addresses (73) outside the free data area (74) and correspondingly adapting the file management data.

Abstract: An apparatus for reproducing video data signals has been proposed. It comprises input means for receiving encoded video data signals and processing means for decoding the encoded video data signals into the video data signals. The encoded video data signals comprise a base stream of signals representing a standard resolution portion of the video data signals and at least one enhancement stream of signals representing a high-resolution portion of the video data signals. The apparatus is capable of reproducing high-resolution video data by decoding and combining those streams. Various measures in relation to storing the encoded video data on a record carrier are also proposed.