Method and device for storing stream data such as digital video and non-stream data

A method for recording stream data and non-stream data on a random access storage medium, said method comprising:

• prior to data recording, defining two storage blocks types, respectively called first type block and second type block, which size of each represent a minimum space allocation when selected to store data, where the size of the first type block is at least one magnitude greater than that of the second type block;
• processing stream data or non-stream data blocks to prepare storage according to corresponding storage blocks, each file to be stored being recorded aligned with a start address of a block on the random access storage medium;
• if stream data is to be recorded, allocating a first type block on the random access storage medium for storage of said stream data;
• and
• if non-stream data is to be recorded, splitting a block of the first type into a plurality of blocks of the second type and allocating, for storage of said non-stream data, at least part of said plurality of the second type blocks realized from said splitting said block of the first type.

A random access storage device recording stream data and non-stream data, the random access storage device comprising:

• a storage device organized into sectors and configured to organize and store data, and comprising a random access file system being configured, at initialization and prior to data recording, to define two different logical data block sizes, respectively called first type of block and second type of block, as basic storage units for storage space allocation, each file to be stored being recorded aligned with a start address of a block on the storage device, the first type of block comprising a first quantity of sectors configured to store audio or video streams, and the second type of block comprising a second quantity of sectors configured to store non-stream data, wherein there is one directory tree for both types of blocks, and the first quantity is a multiple of the size of the second quantity;
• and
• processing circuitry configured to:
• allocate at least a block of the first type for storage of stream data,
• to split a block of the first type into a plurality of blocks of the second type when realizing room for storage of non-stream data, and
• to allocate, for storage of said non-stream data, at least a part of said plurality of the blocks of the second type obtained from the splitting of the block of the first type.