Electronic time compressor or expander

Claim 2

An electronic time compressor and expander for translating an input signal from a first frequency band to a second frequency band comprising: a source of said input signals from said first frequency band; clock means for generating clock signals at a clock rate; a control means connected to the output of said clock means for generating a plurality of control signals at predetermined rates; a first sampler means connected to said source of input signals and said control means for sampling said input signal at a first sampling rate as determined by said control means; shift register means, having a predetermined number of stages, with the input of at least one stage connected to the output of said first sampler means, for storing a predetermined plurality of said samples obtained by said first sampler means; said shift register means further including means connected to said control means for shifting said stored samples through said stages of said shift register means in a predetermined sequence at a rate determined by said control means; a second sampler means connected to said control means and the output of at least one stage of said shift register means for sampling the contents of said shift register meanS at a second sampling rate different than said first sampling rate under the control of said control means; and filter means connected to the output of said second sampler means for passing signals in said second frequency band.

Claim 3

The electronic time compressor and expander according to claim 1 wherein said first sampler means includes a sampling gate means having inputs connected to said input signal source and said control means and having an output means connected to said shift register means for sampling said input signal at a rate determined by said control means.

Claim 4

The electronic time compressor and expander according to claim 2 wherein said control means is connected to said sampling gate means for opening said gate means to sample said input signal and to store said samples in said stages at a rate determined by said control means.

Claim 5

The electronic time compressor and expander according to claim 3 wherein said stages of said shift register means each includes an analog storage means for storing the analog value of said input signal.

Claim 6

The electronic time compressor and expander according to claim 1 wherein said first sampler means includes a plurality of sampling gates having inputs connected to said input signal and said control means and each having the outputs thereof connected to the input of a different one of said stages of said shift register means for sampling said input signal at a rate determined by said control means.

Claim 7

The electronic time compressor and expander according to claim 5 wherein said control means is connected to said sampling gates for opening said gates one at a time to sample said input signal and to store said samples in said stages of said shift register means at a rate determined by said control means.

Claim 8

The electronic time compressor and expander according to claim 6 wherein said stages of said shift register means each includes an analog storage means for storing the analog value of said input signal.

Claim 9

The electronic time compressor and expander according to claim 6 wherein said second sampler means includes a plurality of sampling gates each connected to a different one of said stages of said shift register means and said control means for sampling the values stored in said shift register means when opened by said control means; and said control means including means for opening said gates at a rate determined by said control means.

Claim 10

The electronic time compressor and expander according to claim 8 wherein said stages of said shift register means each includes an analog storage means for storing the analog value of said input signal.

Claim 11

The electronic time compressor and expander according to claim 6 wherein said second sampler means includes a sampling gate connected to said shift register means and said control means for sampling a value stored therein when opened by said control means; and said control means including means for opening said gate at said second sampling rate.

Claim 12

The electronic time compressor and expander according to claim 10 wherein said stages of said shift register means each includes an analog storage means for storing the analog value of said input signal.

Claim 13

The electronic time compressor and expander according to claim 1 wherein said shift register means includes an input stage, an output stage and a plurality of intermediate stages; the output of said first sampler means connected to said input stage; and said control means connected to said first sampler means and said shifting means for inserting successive ones of said samples into said input stage means and for shifting said samples successively through said intermediate stages and out said output stage.

Claim 14

The electronic time compressor and expander according to claim 12 wherein said second sampling means includes a plurality of sampling gates each connected to a different one of said stages of said shift register means for sampling the values stored therein when said sampling gAtes are opened; and said control means including means connected to said sampling gates for opening said gates one at a time at said second sampling rate in accordance with said stored sequence.

Claim 15

The electronic time compressor and expander according to claim 13 wherein said means for opening said gates includes a binary shift register means having a plurality of binary stages the output of each connected to a different one of said gates for opening said gates when said binary stage connected thereto contains a binary control bit; and said control means including means for inserting one binary control bit in said binary shift register means and for shifting said binary shift register means at said second sampling rate determined by said control means.

Claim 16

The electronic time compressor and expander according to claim 12 wherein said second sampling means includes a sampling gate connected to said shift register means for sampling a value stored therein when said sampling gate is opened; and said control means including means connected to said sampling gate for opening said gate at said second sampling rate.

Claim 17

The electronic time compressor and expander according to claim 12 wherein said second sampling means includes a sampling gate connected to said first sampling means, said output stage and said control means for selectively sampling either the output of said first sampling means or the output of said output stage of said shift register means at a rate determined by said control means.

Claim 18

An electronic time compressor and expander for translating input signals from a first frequency band to a second frequency band comprising: a source of said input signals in said first frequency band; a clock means for generating clock signals at a clock rate; a control means connected to the output of said clock means for generating first and second control signals having rates which are submultiples of said clock rate; a shift register means, including an input stage, an output stage, and a plurality of intermediate stages; said clock means connected to said shift register means for driving said shift register means at said clock rate; a first sampler means connected to said source of input signals, said control means, and said input stage for sampling said input signals at the rate of said first control signal and for inserting said samples in said input stage; a second sampler means connected to the output of said first sampler means, said output stage, and said control means for sampling the outputs of said first sampler means and said output stage at the rate of said second control signal; and filter means connected to the output of said second sampler means for passing signals in said second frequency band.

Claim 19

An electronic time compressor and expander for translating input signals from a first frequency band to a second frequency band comprising: a source of said input signals in said first frequency band; a clock means for generating clock signals at a clock rate; a control means connected to the output of said clock means for generating first and second control signals having rates which are submultiples of said clock rate; a shift register means, including an input stage, an output stage, and a plurality of intermediate stages; said clock means connected to said shift register means for driving said shift register means at said clock rate; a first sampler means connected to said source of input signals, said control means, and said input stage for sampling said input signals at the rate of said first control signal and for inserting said samples in said input stage; a second sampler means connected to the output of said first sampler means, said output stage, and said control means for sampling the outputs of said first sampler means and said output stage at the rate of said second control signal; and filter means connected to the output of said second sampler means for passing signals in said second frequency band.

Claim 20

An electronic time compressor and expander for translating input signals from a first frequency band to a second frequency band comprising: a source of signals in said first frequency band; a clock means for generating clock signals at a clock rate; a control means connected to the output of said clock means for generating control signals at first, second and third rates; first and second shift register means each including an input stage, an output stage, and a plurality of intermediate stages; said clock means connected to said first and second shift register means for driving said shift register means at said clock rate; a first sampler means connected to said source of input signals, said control means, and said input stages of each said shift register means for sampling said input signals at said first rate and for inserting groups of samples in one of said input stages of a different one of said register means at a second rate; means connected to said control means and connected between said input stages of each one of said shift register means and said output stage of the other one of said shift register means for passing samples between said input and outpuT stages of each of said shift register means except during those periods when said first sampler means is inserting one of said input samples into one of said shift register means; a second sampler means connected to at least one of said shift register means and said control means for sampling selected ones of said stages at said third rate; and filter means connected to the output of said second sampler means for passing signals in said second frequency band.

Claim 21

An electronic time compressor and expander for translating input signals from a first frequency band to a second frequency band comprising: a source of signals in said first frequency band; a clock means for generating clock signals at a clock rate; a control means connected to the output of said clock means for generating control signals at first, second and third rates; first and second shift register means each including an input stage, an output stage, and a plurality of intermediate stages; said clock means connected to said first and second shift register means for driving said shift register means at said clock rate; a first sampler means connected to said source of input signals, said control means, and said input stages of each said shift register means for sampling said input signals at said first rate and for inserting groups of samples in one of said input stages of a different one of said register means at a second rate; means connected to said control means and connected between said input stages of each one of said shift register means and said output stage of the other one of said shift register means for passing samples between said input and outpuT stages of each of said shift register means except during those periods when said first sampler means is inserting one of said input samples into one of said shift register means; a second sampler means connected to at least one of said shift register means and said control means for sampling selected ones of said stages at said third rate; and filter means connected to the output of said second sampler means for passing signals in said second frequency band.

Claim 22

An electronic time compressor and expander according to claim 18 wherein said second sampling means includes a plurality of sampling gates each connected to a different one of said stages for sampling said stages when opened; and said control means including means connected to said sampling gates for opening said gates one at a time at said third rate.

Claim 23

The electronic time compressor and expander according to claim 19 wherein said means for opening said gates includes a binary shift register means having a plurality of binary stages the output of each connected to a different one of said gates for opening said gates when said binary stage connected thereto contains a binary control bit; and said control means including means for inserting one said binary control bit in said binary shift register means and for shifting said binary shift register means at said third rate.

Claim 24

An electronic time compressor and expander for translating input signals from a first frequency band to a second frequency band comprising: a source of signals in said first frequency band; a clock means for generating clock signals at a clock rate; a control means connected to the output of said clock means for generating control signals at first, second and third rates; first, second and third shift register means each having a plurality of stages for storing instantaneous samples of said input signal; a first sampler means connected to said source of signals and said control means for sampling said input signal at said first rate and for passing groups of said samples of said input signal alternately to said first and second shift registers at said second rate; second sampler means connected to said shift register means and said control means for connecting said third shift register means alternately with said first and second shift register means to form a ring during those periods when said second and first shift register means respectively are storing samples from said first sampler means and for shifting samples around said ring at said third rate; third sampler means connected to said third shift register means and said control means for sampling at said third rate said samples being shifted around said ring; and filter means connected to the output of said third sampler means for passing signals in said second frequency band.

Claim 25

An electronic time compressor and expander for translating input signals from a first frequency band to a second frequency band comprising: a source of signals in said first frequency band; a clock means for generating clock signals at a clock rate; a control means connected to the output of said clock means for generating control signals at first, second and third rates; first, second and third shift register means each having a plurality of stages for storing instantaneous samples of said input signal; a first sampler means connected to said source of signals and said control means for sampling said input signal at said first rate and for passing groups of said samples of said input signal alternately to said first and second shift registers at said second rate; second sampler means connected to said shift register means and said control means for connecting said third shift register means alternately with said first and second shift register means to form a ring during those periods when said second and first shift register means respectively are storing samples from said first sampler means and for shifting samples around said ring at said third rate; third sampler means connected to said third shift register means and said control means for sampling at said third rate said samples being shifted around said ring; and filter means connected to the output of said third sampler means for passing signals in said second frequency band.

Claim 26

An electronic time compressor and expander according to claim 1 wherein said first sampling means includes: a first sampling gate having a first input connected to said signal source and a second input connected to said control means; a plurality of sampling gates having inputs connected to the output of said first sampling gate and the output of each of said sampling gates connected to a different stage of said shift register means; means connected to said control means and to the input of each of said sampling gates for opening said sampling gates in a predetermined sequence to store a sample of said input signal in said shift register means at a rate determined by said control means.