Multi-media interface
March 22, 2014. 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 ReferencesElectronic audio communication system Control channel interface circuit Integrated packet switching and circuit switching system Signal multiplexing circuit Automatic synchronous/asynchronous modem Personal computer--as an interface between a telephone station set and a business communication system Communications management system Adaptive digital network interface Real-time digital signal processing relative to multiple digital communication channels Customer programmable automated integrated voice/data technique for communication systems InventorsAssigneeApplicationNo. 216104 filed on 03/22/1994US Classes:370/259, SPECIAL SERVICES370/359, Input or output circuit, per se (i.e., line interface)370/419, Input or output circuit, per se (i.e., line interface)370/465, Adaptive379/88.01, Voice activation or recognition379/88.07, Digital signal processing (DSP)379/88.13, Multimedia system (e.g., voice output combined with fax, video, text, etc.)379/88.25, Message storage in centralized location (e.g., central office, PBX, etc.)379/353, Conversion of signal form379/908, MULTIMEDIA703/25, I/O adapter (e.g., port, controller)703/27, Compatibility emulation715/500.1Synchronization of diverse mediaExaminersPrimary: Hsu, Alpus H.Assistant: Ngo, Ricky Attorney, Agent or FirmInternational ClassesH04J 003/16G06F 003/00 G06F 013/00 AbstractA multi-media interface universally and flexibly supports present (and contemplated) messaging applications including voice mail, facsimile mail, electronic mail, interactive voice response, automated attendant surface services, audio text services, electronic messaging services, radio paging services, speech recognition/speech synthesis, DTMF tone detection, voice recognition, video messaging, video mail, interface of voice and data between the public switched telephone network (PSTN), the packet switched public data network (PSPDN), and mobile/portable telephone subscribers, e.g. cellular telephones and does so at a very high throughput. In order for the host messaging center to provide these services to subscribers communicating over the various communications networks, the multi-media interface makes the necessary protocol conversions for different telecommunications protocols corresponding to various types of telecommunications media (and associated control signalling) which may include, for example, speech in analog form, speech data in pulse code modulated (PCM) form, modem data in PCM digital form, data in analog form modulating sinusoidal carriers, and data in various digital forms associated with a variety of protocol standards. The multi-media interface includes a programmable line interface module and a time slot interchanger switch selectively routes various time slots of information to/from multiple parallel digital signal processors (DSPs), each with its own dual port, high speed RAM. A local central processing unit (CPU) controls and coordinates the line interface, time slot interchanger, and DSPs via a local bus in accordance with the host messaging center. The DSPs are reconfigurable in real time to selectively perform protocol conversions to/from the host's processing and storage format for a wide variety of communications media. Each DSP can simultaneously process up to six digital communications channels so that a large number of multi-media subscribers can be served by the host messaging center in real time. | |
