Intel Corporation

Karl Leinfelder

Amir Hindie

Wesley Hamilton Smith

Karl I Nordling

Jim Beaney

Sebastian Gracias

David Pearce

A modem uses separate receive and transmit modules. A receive sequencer and a transmit sequencer operate relatively autonomously but share state information with each other using a common data area. The sequencers are coded so as to execute without any branching. A signal based command language is used to specify the properties of signals handled by the modem.

Modem using a digital signal processor and separate transmit and receive sequencers

A plurality of modems or modem types can run on a host processor, a digital signal processor or both, either concurrently or selectively. Modules of more than one modem program can be swapped in and out of DSP memory space. Common modem code can be run on either a host processor or on a DSP using respective command libraries.

Multi-modem implementation with host based and digital signal processor based modems

An audio modem provides both the functionality needed for audio processing and that needed for implementing one or more modems. A digital signal processor utilizes a plurality of serial ports to interface with one or more codecs used for interfacing an analog audio channel and with one or more modem codecs used for interfacing an analog communications channel.

Integrated audio and modem device

A communications modem, having a processor, interacts with an analog to digital converter and with a digital to analog converter (codec) and does batch processing of samples from the communications line and batch processing of samples from the host to be applied to the communications line. The batch processing lowers the processing rate needed for the modem processor.

Modem using batch processing of signal samples

According to an embodiment of the invention, a modem provides functionality for audio processing and for implementing a modem. A digital signal processor is connected to one or more audio codecs to interface with an analog audio channel, and is connected to one or more modem codecs and a data access arrangement to interface with a communications channel.

A modem is implemented using a host processor or DSP and has execution code for implementing respective receive and transmit functionality which execute without any branching. Coordination of receive and transmit functionality is achieved using state indications in a common data area. Operation without branching eliminates the need for machine cycles associated with branching.

Modem instructions sequentially alternating executions between sending a predetermined number of symbols by a transmit sequencer and receiving by a receive sequencer

A modem adapts to the symbol rate received over a communications line or to the rate needed for sending over that line. The adaptation occurs as a result of using a symbol based command set. Processing resources are committed as symbols arrive or as symbols need to be sent.

Modem with code execution adapted to symbol rate

Modems are implemented using a language made of instructions or commands which are based on the types of signals needed to be generated or processed by the modem. That is, the commands are individually tailored to specify the signals to be sent or processed. The modems can be implemented on a digital signal processor or on a host. The language permits a terseness of expression resulting in smaller code, makes it easy to express the needed manipulations required for modem functionality and permits faster execution.

Modem using a digital signal processor and a signal based command set

System for dedicating a host processor to running one of a plurality of modem programs and dedicating a DSP to running another one of the modem programs

Growing community of inventors

Wake Forest, NC, United States of America

Karl Leinfelder