Converter for catv
阅读：304发布：2023-05-21
专利汇可以提供Converter for catv专利检索，专利查询，专利分析的服务。并且A converter for a CATV system is described. The converter includes, amongst other circuits, a reader for reading the binary bits on an encoded document and comparing them with a binary bit code which is transmitted from the transmitter on the CATV cable to a subscriber''s receiver. If the code on the encoded document and the code received are identical, a signal is generated which enables the converter to process the received television signals so that the subscriber''s receiver can present an intelligible program. Provision is also made in accordance with the code on the document, to select a predetermined one of a plurality of channels being transmitted over the CATV cable.，下面是Converter for catv专利的具体信息内容。
1. In a CATV system wherein at a transmitter a train of digItal code signals along with a train of associated clock signals is seuqentially and repetitively generated and transmitted along with television program signals modulated on a carrier, and which requires further processing for intelligible utilization by a television receiver, and a converter is connected to each subscriber receiver and includes means to receive said television program signals modulated on a carrier, said digital code signals and said associated clock signals, the improvement in said converter comprising: means in said converter for establishing a static condition representative of said digital code signals, means responsive to said static condition and said clock signals for sequentially generating said digital code signals at said converter, means for comparing said digital code signals generated at said receiver with the code signals received from said transmitter and producing an identity signal when they are alike, each time said digital code is received by said converter, integrator means for retaining each identity signal for a predetermined interval, long enough for said receiver to receive a plurality of trains of code signals, means enabled responsive to the presence of said identity signal of said integrator means for processing said television signals modulated on a carrier to enable intelligible utilization by said subscriber receiver.
2. In a CATV system as recited in claim 1 wherein said transmitter generates a plurality of different code signal trains, and said predetermined interval of said code integrator means extends long enough for said converter to receive said plurality of different codes at least once.
3. In a CATV system as recited in claim 1 wherein said means responsive to said static condition and to said clock signals for sequentially generating said digital code signals at said converter includes matrix means responsive to said clock signals for ordering the sequence of the generation of said digital code signals whereby different converters may require the establishment of different static conditions to obtain an identity signal responsive to the same code being transmitted.
4. In a CATV system as recited in claim 3 wherein said means for establishing a static condition representative of said digital code signals comprises a coded card reader.
5. In a CATV system as recited in claim 3 wherein said means for establishing a static condition representative of said digital code signals comprises a set of adjustable switches.
6. In a CATV system wherein, at a transmitter a digital code is generated and transmitted along with television program signals requiring further processing for intelligible utilization by a television receiver, and a converter is connected to each subscriber receiver and includes means to receive said television program signals and said digital code, the improvement in said converter comprising, means for receiving a digital code bearing document in said converter, means for reading the digital code borne by a document inserted into said means for receiving, means for comparing the digital code received by said converter and the digital code read by said means for reading and producing an identity signal when they are alike, and means enabled responsive to the presence of said identity signal to further process said television program signals.
7. In a CATV system as recited in claim 6 wherein said code bearing document is a punched card; said means for reading the digital code borne by a document is a punched card reader; and includes means for reading the code in said punched card serially and in synchronism with the code received by said converter.
8. In a CATV system as recited in claim 6 wherein said television program signals are modulated on a carrier having a nonstandard frequency which is not receivable by a subscriber receiver, and the further processing required for said television program signals is to convert the carrier from a non-standard frequency not receivable by a subscriber television receiver to a standard frequency receivable by a subscriber television receiver; said means in said converter which is enabled responsive to the presence of said identity signal comprises oscillator means for producing an output for heterodyning with said televisionprogram carrier for shifting it to a standard frequency receivable by a television receiver.
9. In a CATV system as recited in claim 6 wherein said means for reading the digital code borne by a document inserted into said means for reading includes means to produce a tuning signal, means responsive to said tuning signal for tuning said converter to process particular television program signals.
10. In a CATV system wherein at a transmitter a train of digital code signals is sequentially and repetitively generated and transmitted along with television program signals modulated on a carrier, and which requires further processing for intelligible utilization by a television receiver, and a converter is connected to each subscriber receiver and includes means to receive said television program signals modulated on a carrier and said code signals, the improvement in said converter comprising: means for receiving a digital code bearing document in said converter, means for sequentially reading the digital code borne by a document inserted into said means for receiving, means for comparing the digital code read by said means for sequentially reading and the digital code received by said converter and producing an identity signal when they are alike each time said digital code is received by said converter, integrator means for retaining each identity signal for a predetermined interval long enough for said converter to receive a plurality of trains of code signals, and means enabled responsive to the presence of said identity signal of said integrator means for processing said television signals modulated on a carrier to enable intelligible utilization by said subscriber receiver.
11. In a CATV system as recited in claim 10 wherein said code bearing document is a punched card; said means for reading the digital code borne by a document is a punched card reader; and includes means for reading the code in said punched card serially and in synchronism with the code received by said converter.
12. In a CATV system as recited in claim 10 wherein said transmitter includes means for generating and transmitting a plurality of different code trains of code signals along with said television program signals modulated on a carrier, sequentially within the predetermined interval of said integrator means.
13. In a CATV system as recited in claim 10 wherein said converter includes a tunable oscillator means, said means for reading includes means responsive to at least a portion of the digital code borne by said document for producing a tuning signal, and means for tuning said tunable oscillator means responsive to said tuning signal to a particular frequency for enabling said converter to process predetermined television program signals modulated on a carrier.
14. In a CATV system as recited in claim 13 wherein said means enabled responsive to the presence of said identity signal, comprises a demodulator which receives the output of said oscillator.
15. In a CATV system as recited in claim 10 wherein said transmitter transmits a plurality of different television program signals modulated on different carriers, each of which requires further processing for intelligible utilization by a television receiver and each having associated trains of code signals, and there is included a variable oscillator means, means for causing said variable oscillator means to sequence through successive frequencies which are required for successively processing all of said television program signals modulated on different carriers, and means responsive to an identity signal to tErminate further operation of said means for causing, whereby a predetermined one of said television program signals modulated on a carrier is processed.
16. In a CATV system as recited in claim 10 wherein said means for sequentially reading the code borne by a document inserted into said means for receiving includes matrix means for ordering the sequence of the read out of the digits of the code in accordance with a predetermined sequence whereby different converters require different code bearing documents to obtain an identity signal responsive to the same code.
17. In a CATV system wherein at a transmitter there is sequentially and repetitively generated a data ready pulse followed by a clocked digital code along with clock pulses and also television program signals modulated on a carrier which require further processing for intelligible utilization by a subscriber receiver, and a converter is provided at each subscriber receiver and includes means to receive all of said signal generated at said transmitter, the improvement in said converter comprising: digital code bearing document reading means for reading the digital code on a code bearing document applied thereto, means responsive to said data ready pulse and said clock pulses for synchronizing the read out of the digital code by said reading means with the clocked digital code received by said converter, means for comparing the digital code read by said means for reading with the digital code received by said converter and producing an identity signal when they are alike each time said digital code is received by said converter, integrator means for retaining each identity signal for a predetermined duration, long enough for said converter to receive a plurality of data ready pulses followed by a clocked digital code, means connected to said integrator means and enabled responsive to the presence of said identity signal for processing said television programs signals for intelligible utilization by a subscriber receiver.
18. In a CATV system as recited in claim 17 wherein said means responsive to said data ready pulse and said clock pulses for synchronizing the readout of the digital code by said reading means with the clocked digital code received by said converter includes, matrix means for ordering the sequence of read out of the code digits in accordance with a predetermined sequence whereby different converters require different code bearing documents to obtain an identity signal responsive to the same transmitted code.
19. In combination, in a CATV system, a transmitter having means for sequentially generating within a predetermined interval a plurality of different binary codes, which are repetitively generated, and means for generating television program signals modulated on a carrier which require further processing for intelligible utilization by a subscriber receiver, converter means connected to receive said different binary codes and said television program signals modulated on a carrier, said converter means having means for receiving a digital code bearing document in said converter, means for sequentially reading the digital code borne by a document insertd into said means for receiving, means for comparing the digital code read by said means for sequentially reading and the digital code received by said converter and producing an identity signal when they are alike each time said digital code is received by said converter, integrator means for retaining each identity signal for an interval long enough for said converter to receive said plurality of different binary codes at least once, and means enabled responsive to the presence of said identity signal of said integrator means for processing said television signals modulated on a carrier to enable its intelligible utilization by said subscriber receiver.
20. In a CATV system as recited in claim 19 wherein said means responsive to said data ready Pulse and said clock pulses for synchronizing the readout of the digital code by said reading means with the clocked digital code received by said converter includes, matrix means for ordering the sequence of readout of the code digits in accordance with a predetermined sequence whereby different converters require different code bearing documents to obtain an identity signal responsive to the same transmitted code.
21. In combination, in a CATV system, a transmitter having means for generating a plurality of different television program signals respectively modulated on different carriers, each of which requires further processing for intelligible utilization by a subscriber receiver; converter means connected to receive said plurality of different television program signals respectively modulated on different carriers, said converter means including digital code bearing document means for reading the code on a document applied thereto, including means for generating a different tuning signal for each different digital code read by said digital code bearing document means, oscillator means to which tuning signals from said means for generating a different tuning signal is applied for tuning said oscillator means to a frequency determined by each different tuning signal, mixer means to which said oscillator means output and said plurality of different television program signals respectively modulated on different carriers are applied, for processing for utilization by said subscriber receiver the one of said plurality of different television program signals as determined by the digital code read by said digital code bearing means.
22. In combination in a CATV system, a transmitter having means for generating a plurality of different television program signals respectively modulated on different carriers, each of which requires further processing for intelligible utilization by a subscriber receiver, converter means connected to receive said plurality of different television program signals respectively modulated on different carriers, said converter means including digital code bearing document means for reading the code on a document applied thereto, including means for generating a different tuning signal for each different digital code read by said digital code bearing document means, and means responsive to the code read by said digital code bearing document means for processing for utilization by said suscriber receiver a predetermined one of said plurality of different television program signals.
23. In combination in a CATV system, a transmitter having means for generating a plurality of different television program signals respectively modulated on different carriers, each of which requires further processing for intelligible utilization by a subscriber receiver, means for generating sequentially and within a predetermined interval a different binary code for each different television program which is repetitively generated, converter means connected to receive said different binary codes and said television program signal modulated on a carrier, said converter means having means for receiving a digital code bearing document in said converter, means for sequentially reading the digital code borne by a document inserted into said means by receiving, means for comparing the digital code read by said means for sequentially reading and the digital code received by said converter and producing an identity signal when they are alike each time said digital code is received by said converter, integrator means for retaining each identity signal for an interval long enough for said converter to receive said plurality of different binary codes at least once, a variable oscillator means, means for causing said variable oscillator means to sequence through successive frequencies which are required for successively processing all of said television program signals modulAted on different carriers, means responsive to an identity signal of said integrator means to terminate further operation of said means for causing whereby a predetermined one of said television program signals modulated on a carrier can be partially processed, further means enabled responsive to said identity signal to complete the processing of said television signals modulated on a carrier to enable its utilization by a television receiver.
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