Audio signal transmission system

Claim 2

An audio signal transmission system comprising: (a) an input section; (b) an output section for outputting a sound; and (c) a transmission section for transmitting an audio signal between said input and output sections, said transmission section comprising: first means for analyzing the spectrum of the audio signal input by said input section to produce variable control signals, said first means being independent of the sound output from said output section; and second means for processing the audio signal on the basis of the variable control signals produced by said first means and in accordance with predetermined control signals related to the physical characteristics of said output section, said second means being arranged to improve the transient characteristics of the audio signal to compensate for distortion in the sound outputted by said output section caused by the physical characteristics of said output section.

Claim 3

A system according to claim 1, wherein said output section includes a plurality of output means which are different from each other with respect to physical response characteristic and wherein said second means includes means for dividing the audio signal into a plurality of subaudio signals which are supplied to the corresponding output means of said plurality.

Claim 4

A system according to claim 1, wherein said transmission section further includes third means for supplying to said second means data on the physical response characteristics of said output section.

Claim 5

A system according to claim 3, wherein said third means includes a memory for storing data on the physical response characteristic of said output section.

Claim 6

A system according to claim 1, wherein said second means includes an adaptive digital filter having a controllable transmission characteristic.

Claim 7

A system according to claim 5, wherein said second means includes series-connected filter means comprising a plurality of series-connected said adaptive digital filters.

Claim 8

A system according to claim 6, wherein said second means includes parallel-connected filter means comprising a plurality of parallel-connected said series-connected filter means.

Claim 9

An audio signal transmission system Comprising: (a) an input section; (b) an output section including a plurality of output means having different physical response characteristics; and (c) a transmission section for transmitting an audio signal between said input section and said output section, said transmission section comprising: analyzing means for analyzing the spectrum of an audio signal input by said input section; and a plurality of processing means for respectively producing a plurality of subaudio signals from the audio signal in accordance with the output of said analyzing means, which subaudio signals are supplied to predetermined ones of said output means of said plurality of output means, each of said plurality of processing means being independent of all of the subaudio signals output from said plurality of processing means, and being arranged to improve the transient characteristics of each of the subaudio signals to compensate for distortion in the output of said plurality of output means caused by the physical characteristics of each of said plurality of output means.

Claim 10

An audio signal transmission system Comprising: (a) an input section; (b) an output section including a plurality of output means having different physical response characteristics; and (c) a transmission section for transmitting an audio signal between said input section and said output section, said transmission section comprising: analyzing means for analyzing the spectrum of an audio signal input by said input section; and a plurality of processing means for respectively producing a plurality of subaudio signals from the audio signal in accordance with the output of said analyzing means, which subaudio signals are supplied to predetermined ones of said output means of said plurality of output means, each of said plurality of processing means being independent of all of the subaudio signals output from said plurality of processing means, and being arranged to improve the transient characteristics of each of the subaudio signals to compensate for distortion in the output of said plurality of output means caused by the physical characteristics of each of said plurality of output means.

Claim 11

A system according to claim 8, wherein the audio signal supplied to said analyzing means includes a digital audio signal, and wherein the analyzing means includes means for receiving the digital audio signal and for calculating the average value data of a plurality of successive date of the audio signal.

Claim 12

A system according to claim 8, wherein each of said plurality of processing means comprises an adaptive digital filter having a controllable transmission characteristic.

Claim 13

A system according to claim 10, wherein each of said plurality of processing means includes a series-connected filter means comprising a plurality of said adaptive digital filters connected in series.

Claim 14

A system according to claim 11, wherein each of said plurality of processing means further includes a plurality of said series-connected filter means respectively connected in parallel.

Claim 15

A system according to claim 10, wherein each of said plurality of processing means further includes a data generator for supplying data, corresponding to the physical response characteristic of each of said output means, to said adaptive digital filter.

Claim 16

An audio signal transmission system comprising: (a) an input section; (b) an output section for outputting a sound; and (c) a transmission section for transmitting an audio signal between said input and output sections, said transmission section comprising: first means for analyzing the spectrum of the audio signal input by said input section to produce variable control signals, said first means being independent of the sound output from said output section; and second means for processing the audio signal on the basis of the variable control signals produced by said first means and in accordance with predetermined control signals related to the physical characteristics of said output section, said second means including series-connected adaptive digital filters each of which has a controllable transmission characteristic.

Claim 17

An audio signal transmission system comprising: (a) an input section; (b) an output section for outputting a sound; and (c) a transmission section for transmitting an audio signal between said input and output sections, said transmission section comprising: first means for analyzing the spectrum of the audio signal input by said input section to produce variable control signals, said first means being independent of the sound output from said output section; and second means for processing the audio signal on the basis of the variable control signals produced by said first means and in accordance with predetermined control signals related to the physical characteristics of said output section, said second means including series-connected adaptive digital filters each of which has a controllable transmission characteristic.

Claim 18

A system according to claim 14, wherein said second means includes parallel-connected filter means comprising a plurality of said parallel-connected and said series-connected filter means.

Claim 19

An audio signal transmission system comprising: (a) an input section; (b) an output section including a plurality of output means having different physical response characteristics; and (c) a transmission section for transmitting an audio signal between said input section and said output section, said transmission section comprising: analyzing means for analyzing the spectrum of the audio signal input by said input section; and a plurality of processing means for respectively producing a plurality of subaudio signals from the audio signal in accordance with the output of said analyzing means, which subaudio signals are supplied to predetermined ones of said output means of said plurality of output means, each of said plurality of processing means being independent of all of the subaudio signals output from said plurality of processing means, and including series-connected filter means which comprises a plurality of series-connected adaptive digital filters each having a controllable transmission characteristic.

Claim 20

An audio signal transmission system comprising: (a) an input section; (b) an output section including a plurality of output means having different physical response characteristics; and (c) a transmission section for transmitting an audio signal between said input section and said output section, said transmission section comprising: analyzing means for analyzing the spectrum of the audio signal input by said input section; and a plurality of processing means for respectively producing a plurality of subaudio signals from the audio signal in accordance with the output of said analyzing means, which subaudio signals are supplied to predetermined ones of said output means of said plurality of output means, each of said plurality of processing means being independent of all of the subaudio signals output from said plurality of processing means, and including series-connected filter means which comprises a plurality of series-connected adaptive digital filters each having a controllable transmission characteristic.

Claim 21

A system according to claim 16, wherein each of said plurality of processing means includes series-connected filter means comprising a plurality of said series-connected filter means.