Method and apparatus for synchronizing the readout of a sequential media device with a separate clocked device
September 16, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDigital recording and playback method and apparatus Apparatus for reading an optically coded disc-shaped record carrier Optical data format employing resynchronizable data sectors Compact disc drive apparatus having an interface for transferring data and commands to and from a host controller Sequential buffer device 4872073 Asynchronous voice reconstruction for a digital communication system Patent #: 5103467 InventorsApplicationNo. 760653 filed on 09/16/1991US Classes:369/47.33, Including static memory fill level monitoring or controlling711/112Direct access storage device (DASD)ExaminersPrimary: Psitos, Aristotelis M.Assistant: Huber, Paul W. Attorney, Agent or FirmInternational ClassG11B 020/10AbstractA method and apparatus for controlling the readout rate of information from a sequential storage medium, such as a CD-ROM, to maintain synchronism between the device containing the medium and an independent receiver receiving the information. Information is loaded from the media into a buffer at a rate controlled by pulses from a device clock. Information is unloaded from the buffer for utilization by the receiver independently of the loading of the buffer. The amount of free space available in the buffer is measured as information is loaded into the buffer. The rate of the clock is dynamically adjusted in response to the amount of free buffer space to maintain the full state of the buffer within predetermined limits. In this manner, the buffer never empties or fills in response to the unloading by the independent receiver.Field of SearchData clocking | |
