Abstract: The present invention relates to a recording device (1) and a corresponding recording method for recording user data in a user area (UA) on a recordable or rewritable optical record carrier (4) comprising OPC means (3) for performing optical power calibration by writing OPC test data on a record carrier (4) before user data are recorded thereon. To avoid the problem that no more user data can be recorded on the record carrier since an OPC area (40) particularly reserved for writing said OPC test data is full, and to enable the provision of a smaller OPC area (40), it is proposed according to the present invention that the OPC test data are written in said user area (41, 42) if the OPC area (40) reserved for writing said OPC test data is not usable or not provided on the record carrier (4).

Abstract: The invention relates to a method of encoding user data into codevectors and to a corresponding method of decoding codevectors into user data.

Abstract: The invention relates to an information carrier 10 comprising a main channel and an auxiliary channel carrying position information 21, according to which some of the least significant bits of the position information 21 are made available as local-position information 22 at a higher rate than the whole position information 21. The information carrier can be in particular an optical disk of recordable type, wherein the auxiliary channel is the wobble channel and the position information 21 is an address. An embodiment of the invention is described of an optical disc based on Blue-ray Disk standard. When an estimate of the current address is already available and the uncertainty only resides in some of the least significant bits, the entire address can be quickly reconstructed as soon as a repetition of the local-position information 22 is acquired. The invention further relates to an apparatus for accessing such an information carrier 10.

Abstract: The present invention relates to an information carrier for storing user-data, said information carrier comprising a wobbled pre-groove having stored a wobble information and comprising sinusoidal wobbles. The wobble information is encoded by use of ADIP units, which are formed by sequences of sinusoidal wobbles having embedded patterns of MSK marks. In order to avoid the use of an MSK mark present at the beginning of each ADIP unit, as according to Blue-ray Disc, and the consequent wobble beat, a new set of ADIP units is introduced wherein MSK marks are disposed in patterns according to which no mark is in a common position in all the set of ADIP units. The invention further relates to a device and a method for reading the wobble information from the information carrier, and to a recording apparatus and method for recording user-data therein.

Abstract: A method is described for storing information on an optical disc, wherein data is encoded to form ECC blocks, and wherein the ECC blocks are written in predefined writing zones (Z) between run-in/run-out fields. According to the present invention, two or more ECC blocks are written between a run-in field and a run-out field.

Abstract: A method is described for writing information to a record medium (2). 152 code words [11(j)] each having 248 bytes [mI(ij)] and 12 BIS words each having 62 BIS bytes [b2(r,s)] are combined to form an ECC block (M3) having 38 440 elements [m3(v,w)], which elements are consecutively written. Also, a method is described for reading information from a record medium (2). An ECC block (M3) having 38 440 elements [m3(v,w)] is read, from which 152 code words [11(j)] each having 248 bytes [ml(ij)]and 12 BIS words each having 62 BIS bytes [b2(r,s)] are reconstructed.

Abstract: The invention relates to an information carrier for holding user information, the information carrier comprising access information in the form of access information bits for accessing the user information, the access information bits being stored on the information carrier in a variation of a parameter, which variation is detectable by integration detection. The access information bits are scrambled according to a pre-determined scrambling method. By scrambling the access information bits according to a pre-determined scrambling method detection of the access information is not possible as long as the scrambling method is not known. Using the integration detection technique only results in the access information is one knows how the signal obtained after reading-out the area comprising the access information bits must be processed. In this way illegal retrieval of the user information is further prevented.

Abstract: The present invention relates in general to a method of storing information on an optical disc. More specifically, the present invention relates to a storage method according to a standard where ECC blocks are written between run-in/run-out fields.

Abstract: On a small record carrier the inner section of the record carrier represents a significant amount of storage capacity. A regular ECC block however occupies more than one revolution of the record carrier leading to multiplication of burst errors in a single ECC block. By using two ECC block sizes the multiplication of burst errors is prevented. The transition from the small ECC blocks in the inner annular section to the large ECC blocks in the outer annular section of the disk is positioned where one ECC block from the outer annular section occupies one revolution of the record carrier. Thus an optimum division is achieved between large and small ECC blocks optimizing storage capacity and error correction capabilities.

Abstract: The invention relates to an information carrier for holding user information, the information carrier comprising access information for accessing the user information, the access information being stored in a pre-determined first region on the information carrier. The information carrier further comprises at least one further region different from the first region, the further region comprising dummy information. The invention is based on the insight that the noise level of a read out signal increases somewhat in the region(s) where the access information is hidden. To avoid this difference in noise level between regions with and without the access information, this access information is assigned for only a specific region of the information carrier, but dummy information is also written in other regions. Due to this, an improved copy protection system against illegal read out of the user information present or to be present on the information carrier is realized.

Abstract: Method and apparatus for reading a magneto-optical domain expansion recording medium (10), wherein the size of a spatial copy window of a domain copying process is controlled by varying a predetermined reading parameter in response to a control information derived from a readout pulse. A predetermined additional pattern of change is applied to said predetermined parameter and the control information is then derived from a deviation of a clock signal. The size of the copy window can thus be controlled dynamically to obtain a robust and reliable readout process.

Abstract: The invention relates to a method of encoding user data into codevectors and to a corresponding method of decoding codevectors into user data.