Abstract: The invention relates to a method for encoding a stream of bits of a signal relating to a binary source into a stream of bits of a signal relating to a binary channel, the binary source comprising a main source and a secondary source, the main source being encoded in a main channel and the secondary source being encoded in a secondary channel, the secondary channel being embedded in the main channel in order to form the binary channel, wherein the binary channel is divided in blocks, each block comprising a number of user bits and that in at least one of the blocks the secondary channel also is used for encoding non-user bits.

Abstract: The present invention relates to magneto-optical recording technique whereby improved domain expansion reading is achieved. A mark region is recorded as a sub-mark portion and an adjacent sub-space portion, wherein the length of the sub-mark portion is set to be less than or equal to the length of the sub-space portion. Stray field variations due to different runlengths of the recording data can thus be equalized even for short channel bit lengths, while the resolution and/or power margin is improved.

Abstract: For high-resolution and low bit-error-rate MAMMOS readout a magnetic head is proposed, which head includes a flat magnetic coil (1) having a coil layer structure (3a, 3b) comprising an electrically conductive winding (5a, 5b) and includes a permanent-magnet layer structure (7) which extends parallel to the coil layer structure and has an in-plane magnetic axis (m).