Universal modem for digital video, audio and data communications

Claim 2

In a network communications system in which information is transmitted from a send side to a receive side over a communications channel, an apparatus for improving system performance comprising: means for sensing a channel parameter; and means for changing a modulation format of the transmitted information by generating instructions including modulation format configuration data, responsive to the sensed channel parameter, and having software-configurable logic means for changing the modulation format in accordance with the instructions, wherein said software-configurable logic means includes logic elements whose functionality is capable of being changed in software.

Claim 3

The apparatus of claim 1 , wherein said modulation format changing means includes: a universal modem at each of said sides, each universal modem providing different modulation formats for use in the modulation and demodulation of a signal, the universal modem at the transmit side including a modulator and the universal modem at the receive side including a demodulator; means for generating, as an output, configuration instructions for said software-configurable logic means; means for coupling said output to said software configurable logic means to configure said modems for the modulation format specified by said configuration instructions; and means responsive to the sensing of said channel parameter for causing said instruction generating means to change the modulation format generated by the universal modem at said send side and a demodulation format of the universal modem at said receive side to a changed format.

Claim 4

The apparatus of claim 2 , wherein said detected parameter is channel noise, and wherein said changed format is one which minimizes the effects of channel noise.

Claim 5

The apparatus of claim 2 , wherein said modulation format changing means includes: means for generating a control signal for specifying modulation formats, each of said modems coupled to said control signal and providing respectively modulation and demodulation in accordance with the format specified by said control signal; means for generating, as an output, different instructions for different modulation formats, each of said different instructions including modulation format configuration data based on the modulation format specified by said control signal; a memory for storing said modulation format configuration data, said memory being coupled to an associated modem for supplying said modulation format configuration data thereto; and means responsive to said instructions to configure the associated modem for one of said different modulation formats in accordance with the configuration data included therein.

Claim 6

In a network communications system in which information is transmitted from a send side to a receive side over a communications channel, an apparatus for improving system performance comprising: means for sensing a channel parameter; and means for changing a modulation format of the transmitted information by generating instructions including modulation format configuration data, responsive to the sensed channel parameter, wherein said modulation format changing means includes: a universal modem at each of said sides, each universal modem providing different modulation formats for use in the modulation and demodulation of a signal, the universal modem at the transmit side including a modulator and the universal modem at the receive side including a demodulator, said modulator and demodulator each having software-configurable logic means for respectively providing modulation and demodulation of a signal; means for generating, as an output, configuration instructions for said software-configurable logic means; means for coupling said output to said software configurable logic means to configure said modems for the modulation format specified by said configuration instructions; means responsive to the sensing of said channel parameter for causing said instruction generating means to change the modulation format generated by the universal modem at said send side and a demodulation format of the universal modem at said receive side to a changed format; and wherein said software-configurable logic means includes a number of elements, each performing a different modulation/demodulation function, and means for interconnecting said elements to perform in accordance with said configuration instructions.

Claim 7

In a network communications system in which information is transmitted from a send side to a receive side over a communications channel, an apparatus for improving system performance comprising: means for sensing a channel parameter; and means for changing a modulation format of the transmitted information by generating instructions including modulation format configuration data, responsive to the sensed channel parameter, wherein said modulation format changing means includes: a universal modem at each of said sides, each universal modem providing different modulation formats for use in the modulation and demodulation of a signal, the universal modem at the transmit side including a modulator and the universal modem at the receive side including a demodulator, said modulator and demodulator each having software-configurable logic means for respectively providing modulation and demodulation of a signal; means for generating, as an output, configuration instructions for said software-configurable logic means; means for coupling said output to said software configurable logic means to configure said modems for the modulation format specified by said configuration instructions; means responsive to the sensing of said channel parameter for causing said instruction generating means to change the modulation format generated by the universal modem at said send side and a demodulation format of the universal modem at said receive side to a changed format; and wherein said software-configurable logic means includes a number of elements, each performing a different modulation/demodulation function, and means for interconnecting said elements to perform in accordance with said configuration instructions.

Claim 8

The apparatus of claim 5 , wherein said elements are taken from a group consisting of arithmetic logic units, registers, fifo buffers, gates, finite impulse response filters and infinite impulse response filters.

Claim 11

A system according to claim 7 , wherein the controller is further configured to direct changes which include adding information corresponding to a new modulation format not previously included in the multiple modulation formats.

Claim 12

A system according to claim 7 , wherein the modulation circuit is configured to modulate a first signal in a first of the multiple modulation formats and the demodulation circuit is configured to demodulate the first signal in the first modulation format, and further comprising: a noise detector configured to detect noise in the first signal; wherein, if the detected noise exceeds a threshold, the controller is further configured to direct the first modem to reconfigure the modulation circuit to modulate a subsequent signal in a second of the multiple modulation formats, which is different than the first modulation format, and to direct the second modem to reconfigure the demodulation circuit to demodulate the subsequent signal in the second modulation format.

Claim 13

A system according to claim 7 , wherein the information includes at least one of frequency information and bandwidth information associated with each of the multiple modulation formats.

Claim 16

A method according to claim 11 , wherein the directed changes include directing additional information corresponding to a new modulation format not previously included in the multiple modulation formats to be stored in the first memory and the second memory.

Claim 17

A method according to claim 11 , wherein the modulation circuit is configured to modulate a first signal in a first of the multiple modulation formats and the demodulation circuit is configured to demodulate the signal in the first modulation format, and further comprising the steps of: detecting noise in the first signal; determining if the detected noise exceeds a threshold; reconfiguring the modulation circuit in accordance with the information stored in the first memory to modulate a subsequent signal in a second of the multiple modulation formats, which is different than the first modulation format, if the detected noise is determined to exceed the threshold; and reconfiguring the demodulation circuit in accordance with the information stored in the second memory to demodulate the subsequent signal in the second modulation format, if the detected noise is determined to exceed the threshold.

Claim 20

An apparatus according to claim 14 , wherein the multiple modulation formats include at least three modulation formats.

Claim 21

An apparatus according to claim 14 , further comprising: a memory configured to store information associated with each of the multiple modulation formats; wherein the controller is further capable of directing the configuration of the demodulation circuit to correspond to the header portion modulation format in accordance with the stored information associated with the header portion modulation format and of directing the reconfiguration of the demodulation circuit to correspond to the determined data portion modulation format in accordance with the stored information associated with the data portion modulation format.

Claim 24

An apparatus according to claim 17 , wherein the multiple modulation formats include at least three modulation formats.

Claim 25

An apparatus according to claim 17 , further comprising: a memory configured to store information associated with each of the multiple modulation formats; wherein the controller is further capable of directing the reconfiguration of the modulation circuit to correspond to the first modulation format in accordance with the stored information associated with the first modulation format and the reconfiguration of the modulation circuit to correspond to the second modulation format in accordance with the stored information associated with the second modulation format.