Sonic Solutions

Roxio, Inc.

Kenneth R James

Luke Kien La

Michael Scott McMurdie

Luke Kein La

A software driven method for appending data to a rewritable optical disc is provided. The method includes detecting a rewritable optical disc, and the rewritable optical disc contains a first written session with a file system and an associated volume descriptor. The method then detects a request to write a new session to the rewritable optical disc. Now, it is determined that the new session is to be written past a boundary limit, e.g., such as an OS boundary. A new file system for the new session is then generated, where the new file system having an updated volume descriptor. Data for the new session is written and the volume descriptor of the first written session is replaced with the updated volume descriptor.

Methods and systems for expanding recording capacity of optical discs

A method for recording data to optical media is provided. A selection of files to record from a source to a destination optical media is received, and an enumeration of the data files to record to the destination optical media is generated. The enumeration of data files includes the determining of whether any source file is in the enumeration of data files to record to the destination optical media more than one time. A destination file path node is mapped for each data file to be recorded to the destination optical media, and the selection of data files is recorded to the destination optical media. The recording includes only one occurrence of any source file in the enumeration of data files to record to the destination optical media.

Methods for recording data to optical media

Methods and media for pre-mastering in preparation for recording data files to optical media are provided. In one example, a method for pre-mastering includes receiving a selection of data files to be recorded to an optical media and generating a database in which to list the selection. The database is populated with the selection of data files which are identified by file node and listed in alphabetical order by directory. The method provides for accessing a file in the database, verifying a source location of the accessed file, verifying an integrity of the accessed file, and determining a destination location for the accessed file. The determining of the destination location includes determining a logical block to which at least a portion of the accessed file is to be recorded on the optical media.

Pre-mastering for optical media recording

Methods for the processing of data files to be recorded on an optical disc are provided. In one example, a method includes the operations of examining a set of files selected to be recorded on an optical disc and then creating a record data structure for each file to be recorded. The files are sequenced in the order in which they will be written to the optical disc by use of pointers to the record data structures. The record data structures are then processed in the writing order creating an ordering data structure for each data file. The ordering data structures are processed to write the set of files onto the optical disc in the writing order. In another example, a computer readable media is provided having program instructions for recording data onto an optical disc. The program instructions process the files to be written by examining the set of files, creating the record data structures, generating the set of pointers associating the record data structures with a writing order, and producing the ordering data structures for each file in the set of files. The program instructions further include the operations of processing the ordering data structures and writing the set of files onto the optical disc in the writing order.

Methods for efficient host processing of data files selected for recording to an optical disc media

A method for recording data to optical media is provided. Embodiments include receiving a selection of data files to record from a source to a destination optical media, and generating an enumeration of the data files. The enumeration identifies each source file by a source file path node. A location on the destination optical media to record each source file is identified by destination file path node for each data file. Only one occurrence of any source file in the enumeration of data files will be recorded to the destination optical media, and a data tree of files on the destination optical media includes multiple pointers to the same data file.

Methods for maximizing recording efficiency when recording data from a source to an optical media are provided. In one example, a method includes identifying a list of files to be recorded, and then generating a plurality of recording orders for the list of files. A plurality of writing speeds supported by a target optical media recording device are determined, and then each of the plurality of recording orders for the list of files at each of the plurality of writing speeds are evaluated to determine the amount of system cache required and the projected recording time for recording the data. The method selects a single recording order and a single writing speed that minimizes system cache utilization and minimizes actual recording time to record the data from the source to the optical media.

Methods for optimizing recording order of data files to optical media

Methods for processing and recording data files to an optical disc media are provided. In one example, a method includes the operations of processing data files selected to be recorded and generating a file system database. The file system database generates information about the source data files, and in response to a request for a number of sectors of data, reads the requested sectors of data one at a time into a system memory buffer. The file system database writes a subheader for each of the sectors of data after each sector is written into a memory location that is before each data sector. The sectors and subheaders are then written to an optical disc media. In another example, a computer readable media is provided having program instructions for recording data on an optical disc. The program instructions generate source data information from a file system database and request a number of sectors of data from the file system database. The program instructions further include the operations of the file system reading the requested sectors one at a time into system memory buffer, writing a subheader after each sector is written into a location that is before each sector, and then recording the sectors and subheaders to an optical disc media.

Methods for processing data transferred to system memory in preparation for recording to an optical disc

Methods for organizing and recording data files on an optical disc that increases the file storage capacity of optical discs are provided. In one example, a method includes the operations of determining the length of a file system of data to be recorded and then writing a volume descriptor sequence for the session. The file system, or any portion of it that will fit is then recorded before logical block A portion of the data files or file extents is recorded in any space that may remain after the file system and before block and then the fixed location CD-Plus file is recorded in block The remaining portion of the file system is recorded immediately following the CD-Plus file. In another example, a method includes the similar operations of determining the length of a file system of data to be recorded and then writing a volume descriptor sequence for the session, but then writes only the file system or any portion of the file system that fits before logical block In yet another example, a method includes recording the file system after logical block and recording any portion of the data files or file extents after the volume descriptor sequence and before logical block

Methods for increasing file storage capacity of optical discs

Disclosed is a method for handling buffer under-runs during disc recording sessions on an optical disc. The method includes the operations of recording a volume descriptor sequence for the recording session, and then recording the data for the recording session following the volume descriptor sequence. A track of the recording session is closed upon an occurrence of a buffer under-run, and a continuation of the data is recorded in a next track of the recording session. A file system is then written following the data written in the next track, such that the volume descriptor sequence has a pointer to the file system. In one example, the method includes estimating a number of buffer under-runs before beginning the recording, and adding a correction increment corresponding to the estimated number of buffer under-runs that is configured to define a location for writing the file system.

Method for handling buffer under-run during disc recording

A method for handling buffer under-runs during the recording of files to an optical disc is provided. The method includes reserving a track for recording a file system associated with recording of one or more files on the optical disc. Then, the method moves to record the one or more files onto the optical disc in a track that logically follows the reserved track. In case of a buffer under-run, the method proceeds to close a current track and begin a following track after a gap, thus inserting a gap for each buffer under-run. Path tables and directory descriptors of the file system are then written after recording the one or more files. A volume descriptor sequence of the file system is recorded in the reserved track at a time after recording the path tables and the directory descriptor. The file system can also be as defined in the Joliet standard and the UDF standards.

Growing community of inventors

Sunnyvale, CA, United States of America

Kenneth R James