Method for cascading detachable conditional access modules, circuit for inserting a predetermined sequence and circuit for detecting the said sequence in order to implement the method
September 24, 2016. 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 ReferencesMethod and apparatus for use in a network of the ethernet type, to improve fairness by controlling the interpacket gap in the event of channel capture Clock correction in a video data decoder using video synchronization signals Apparatus and method for segmentation and time synchronization of the transmission of multimedia data Method and apparatus for conditioning timed program independent of transport timing Single oscillator compressed digital information receiver MPEG transport encoding/decoding system for recording transport streams Conditional access filter as for a packet video signal inverse transport system System and method for reducing jitter in a packet-based transmission network Video decoder apparatus using non-reference frame as an additional prediction source and method therefor Transport controller for timed program data InventorApplicationNo. 718823 filed on 09/24/1996US Classes:370/509, Using synchronization information contained in a frame348/423.1, Arrangements for multiplexing one video signal, one or more audio signals, and a synchronizing signal348/425.4, Involving synchronization370/529Information superimposed on other informationExaminersPrimary: Olms, Douglas W.Assistant: Phunkulh, Bob A. Attorney, Agent or FirmForeign Patent References
International ClassH04J 003/00Foreign Application Priority Data1995-10-31 FRAbstractThe present invention concerns a method for cascading detachable conditional access modules as well as a circuit for inserting a predetermined sequence and a circuit for detecting the sequence. Each module receives a data stream formed of packets of fixed length separated by an interpacket space of fixed length. The interpacket spaces contain a constant predetermined sequence which does not interfere with the packets. The predetermined sequence may be used to regenerate a packet clock signal.Other References
Field of SearchSequencing or resequencing of packets to insure proper output sequence orderCombining or distributing information via time channels Synchronizing Transmission time into time slots adjusted based upon propagation delay time Using synchronization information contained in a frame Synchronization information is distributed within a frame Signaling (ancillary to main information) Information superimposed on other information Including priority resolution Arrangements for multiplexing one video signal, one or more audio signals, and a synchronizing signal | |
