WO1996019898B1 - Charge-coupled-device all-analog wave-form scrambling - Google Patents
Charge-coupled-device all-analog wave-form scramblingInfo
- Publication number
- WO1996019898B1 WO1996019898B1 PCT/US1995/016018 US9516018W WO9619898B1 WO 1996019898 B1 WO1996019898 B1 WO 1996019898B1 US 9516018 W US9516018 W US 9516018W WO 9619898 B1 WO9619898 B1 WO 9619898B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- analog
- input
- analog signal
- source
- signals
- Prior art date
Links
- 230000000875 corresponding Effects 0.000 claims abstract 7
- 230000011664 signaling Effects 0.000 claims abstract 5
- 230000005540 biological transmission Effects 0.000 claims abstract 3
- 241001442055 Vipera berus Species 0.000 claims 1
- 230000001808 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
Abstract
A scrambled analog signalling system having a source of analog signals to be sent to a receiving device is comprised of a multiple stage charge coupled device (66) having analog signal input terminals connected to receive analog signal samples from said source of analog signals. The multiple stage charge coupled device having N stages, corresponding stage taps, and an input clock signal. A shuffling circuit (68) having a first input connected to the N stage taps for receiving the analog signal samples and second input for receiving a random seed (67) signal to cause a random reordering of incoming analog signal samples, a source of random seed signals connected to the second input, and an output device (72) connected to receive a stream of the analog signal samples which have been shuffled according to a mapping code carried by the random seed signal. A filter for reconstructing the analog signal in its scrambled format, and a transmission system for conveying the analog signal in its scrambled format to the receiving device.
Claims
1. An analog scrambling signalling system having a source of analog signals to be scrambled and sent to a receiving device, comprising:
two multiple stage, charge coupled devices (CCDs), each CCD having an analog signal input terminal connected to receive analog signal samples front said source of analog signals, each said multiple stage charge coupled device having N stages, corresponding stage tape, and an input clock signal,
switch means for alternately connecting said multiple stage CCDs to said source of analog signals at a rate of I/NT where T is the input sample shifting period,
a pair of N stage multipliers, each multiplier having a first input connected to corresponding N stage taps of said CCDs, respectively, to receive the analog signal samples at the said stage taps, second input for receiving a random seed signal to cause a randon reordering of incoming analog signal samples, and N stage outputs, a source of random seed signals connected to said second input, and
adder means connected to said pair of multiplier N stage outputs for receiving a stream of said analog signal samples which have been shuffled according to a mapping code carried by said random seed signal.
2. A scrambled analog signalling system having a source of analog signals to be sent to a receiving device, comprising:
a plurality of multiple stage charge coupled devices (CCDs) having analog signal input terminal connected to receive analog signal samples from said source of analog signals, each said multiple stage charge coupled device having different number of stages, corresponding stage taps, and an input clock signal,
an input switching circuit having an input connected for receiving the analog signal samples from said source and a plurality of outputs connected on a one-to-one basis with the analog signal input terminal of said CCD device, respectively, and second input for receiving a switching control signal to cause a random switching of incoming analog signal samples, a source of switching control signals connected to said second input, an output switch circuit controlled by said switching control signal and connected on a one-to-one basis with each of said CCDs, respectively, to receive a stream of said analog signal samples.
3. A scrambled analog signalling system having a source of analog signal signals to be sent to a receiving device,
comprising:
a plurality of multiple stage charge coupled devices (CCDs), each having analog signal input terminal connected to receive analog signal samples from said source of analog signals, each said multiple stage charge coupled device having N stages, corresponding stage taps, and an input clock signal, an input routing switching circuit having an input connected to receive the analog signals from said source and a plurality of outputs, said outputs being connected on a one-to-one basis to the analog signal input for said CCDs, respectively,
an output switch connected to receive the outputs of all said CCDs having an output terminal, and
a source of said signals connected to said output switch for randomly selecting and coupling the output terminal of said output switch.
4. An analog signalling system having a source of analog signals to be sent in scrambled form to a receiving device, comprising:
first and second multiple stage charge coupled devices
(CCDs), each CCD having analog signal input terminal connected to receive analog signals from said source of analog signals, each said multiple stage charge coupled device having corresponding N stages, respectively, corresponding stage taps, respectively, and an input clock signal,
a shuffling circuit including a reverse mapper circuit connected between said first and second CCDs,
transmission means for conveying said analog signal in its scrambled format to said receiving device, and
switch means alternately connecting said first or said second CCD to said transmission means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU46844/96A AU4684496A (en) | 1994-12-22 | 1995-12-21 | Charge-coupled-device all-analog wave-form scrambling |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/362,269 US5598472A (en) | 1994-12-22 | 1994-12-22 | Charge-coupled-device based all-analog wave form scrambling with applications in audio, video, video-on-demand, and TV systems |
| US08/362,269 | 1994-12-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1996019898A1 WO1996019898A1 (en) | 1996-06-27 |
| WO1996019898B1 true WO1996019898B1 (en) | 1996-08-15 |
Family
ID=23425428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1995/016018 WO1996019898A1 (en) | 1994-12-22 | 1995-12-21 | Charge-coupled-device all-analog wave-form scrambling |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5598472A (en) |
| AU (1) | AU4684496A (en) |
| WO (1) | WO1996019898A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020188570A1 (en) * | 1999-03-24 | 2002-12-12 | Donna Coningsby | Partial protection of content |
| US6545623B1 (en) * | 1999-12-23 | 2003-04-08 | Texas Instruments Incorporated | High speed analog-domain shuffler for analog to digital converter |
| US7139397B2 (en) * | 2001-07-20 | 2006-11-21 | Stmicroelectronics S.R.L. | Hybrid architecture for realizing a random numbers generator |
| FR2928796B1 (en) * | 2008-03-14 | 2015-03-06 | Viaccess Sa | METHOD OF SECURING MESSAGES TRANSMITTED BY A TRANSMITTER TERMINAL TO A REMOTE RECEIVER TERMINAL. |
| WO2020158540A1 (en) * | 2019-01-30 | 2020-08-06 | ソニー株式会社 | Sensor device and encryption method |
| CN113348644A (en) * | 2019-01-30 | 2021-09-03 | 索尼集团公司 | Sensor device and encryption method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4600942A (en) * | 1982-07-29 | 1986-07-15 | Telease, Inc. | Secure coding and decoding system and method for television program signals |
| US4663659A (en) * | 1985-10-31 | 1987-05-05 | Rca Corporation | Video signal scrambling system employing full line reversal and double burst coding |
| US4901349A (en) * | 1987-12-31 | 1990-02-13 | Communications Satellite Corporation | Time dispersal encryption of TV signals |
-
1994
- 1994-12-22 US US08/362,269 patent/US5598472A/en not_active Expired - Lifetime
-
1995
- 1995-12-21 WO PCT/US1995/016018 patent/WO1996019898A1/en active Application Filing
- 1995-12-21 AU AU46844/96A patent/AU4684496A/en not_active Abandoned
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