Patents by Inventor James O. McPherson
James O. McPherson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5126990Abstract: Method for evaluating the quality of audio and/or video transfer characteristics of a device upon which, or through which, audio and/or video information is contained, or passes, respectively. The method concerns the evaluation of the quality of information transfer in the recording and playback of a recording medium or in the transferring of audio and/or video information through an information handling device referred to as a throughput device. Unit evaluation includes establishing an input signal of known content, measuring selected parameters of selected parts of the input signal, feeding the input signal to the unit under test, measuring the parameters of parts of the output signal from the unit corresponding to the same selected parts of the input signal, and comparing the selected parameters of the input signal with the corresponding parameters of the output signal.Type: GrantFiled: September 30, 1982Date of Patent: June 30, 1992Assignee: Discovision AssociatesInventors: Edward Efron, James O. McPherson, Young B. Kim
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Patent number: 5001568Abstract: A series of separate analog electrical signals are received at a real time rate and converted to digital equivalents. The converted signals are stored in a digital memory from which the signals are released serially at a rate slower than the real time rate at which the signals are received. The signals released from storage are directed to a signal analyzer, preferably after being converted from digital to analog format, for processing to determine prescribed parameters of the original analog electrical signals.Type: GrantFiled: September 30, 1982Date of Patent: March 19, 1991Assignee: Discovision AssociatesInventors: Edward Efron, James O. McPherson, Young B. Kim
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Patent number: 4764915Abstract: Method and apparatus for evaluating the quality of audio and/or video transfer characteristics of a device upon which, or through which, audio and/or video information is contained, or passes, respectively. Both method and apparatus concern the evaluation of the quality of information transfer in the recording and playing back of a recording medium or in the transferring of audio and/or video information through an information handling device referred to as a throughput device. Unit evaluation is accomplished by establishing an input signal of known content, measuring selected parameters of selected parts of the input signal, feeding the input signal to the unit under test, measuring the parameters of parts of the output signal from the unit under test corresponding to the same selected parts of the input signal, and comparing the selected parameters of the input signal with the corresponding parameters of the output signal.Type: GrantFiled: June 27, 1984Date of Patent: August 16, 1988Assignee: Discovision AssociatesInventors: Edward Efron, James O. McPherson, Young B. Kim
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Patent number: 4755884Abstract: Method and apparatus for evaluating the audio characteristics of an audio-video program recorded on a storage member in which the video portion of the program contains picture frame code numbers. A predetermined picture frame number at which video evaluation of the audio portion of the program is to commence in initially established. The audio and video portions of the recorded audio-video program are recovered, and the picture frame code numbers are extracted from the video portion thereof. The extracted picture frame numbers from the recovered video portion are then compared with the predetermined picture frame number, and audio evaluation of the audio portion of the program commences upon coincidence of the detected picture frame number and the predetermined picture number. Evaluation is effected by measuring predetermined picture number.Type: GrantFiled: January 13, 1986Date of Patent: July 5, 1988Assignee: Discovision AssociatesInventors: Edward Efron, James O. McPherson, Young B. Kim
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Patent number: 4746991Abstract: Method and apparatus for evaluating the quality of audio and/or video transfer characteristics of a device upon which, or through which, audio and/or video information is contained, or passes, respectively. Both method and apparatus concern the evaluation of the quality of information transfer in the recording and playing back of a recording medium or in the transferring of audio and/or video information through an information handling device referred to as a throughput device. Unit evaluation is accomplished by establishing an input signal of known content, measuring selected parameters of selected parts of the input signal, feeding the input signal to the unit under test, measuring the parameters of parts of the output signal from the unit under test corresponding to the same selected parts of the input signal, and comparing the selected parameters of the input signal with the corresponding parameters of the output signal.Type: GrantFiled: January 12, 1982Date of Patent: May 24, 1988Assignee: Discovision AssociatesInventors: Edward Efron, James O. McPherson, Young B. Kim
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Patent number: 4682246Abstract: Method and apparatus for evaluating the quality of audio and/or video transfer characteristics of a device upon which, or through which, audio and/or video information is contained, or passes, respectively. Both method and apparatus concern the evaluation of the quality of information transfer in the recording and playing back of a recording medium or in the transferring of audio and/or video information through an information handling device referred to as a throughput device. Unit evaluation is accomplished by establishing an input signal of known content, measuring selected parameters of selected parts of the input signal, feeding the input signal to the unit under test, measuring the parameters of parts of the output signal from the unit under test corresponding to the same selected parts of the input signal, and comparing the selected parameters of the input signal with the corresponding parameters of the output signal.Type: GrantFiled: September 30, 1982Date of Patent: July 21, 1987Assignee: Discovision AssociatesInventors: Edward Efron, James O. McPherson, Young B. Kim
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Patent number: 4623837Abstract: Method and means for evaluating the quality of audio and/or video transfer characteristics of a device upon which, or through which, audio and/or video information is contained, or passes, respectively. Both method and apparatus concern the evaluation of the quality of information transfer in the recording and playing back of a recording medium or in the transferring of audio and/or video information through an information handling device referred to as a throughput device. Unit evaluation is accomplished by establishing an input signal of known content, measuring selected parameters of selected parts of the input signal, feeding the input signal to the unit under test, measuring the parameters of parts of the output signal from the unit under test corresponding to the same selected parts of the input signal, and comparing the selected parameters of the input signal with the corresponding parameters of the output signal.Type: GrantFiled: June 14, 1985Date of Patent: November 18, 1986Assignee: Discovision AssociatesInventors: Edward Efron, James O. McPherson, Young B. Kim
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Patent number: 4598324Abstract: Method and apparatus for evaluating the audio characteristics of an audio-video program recorded on a storage member in which the video portion of the program contains picture frame code numbers. A predetermined picture frame number at which video evaluation of the audio portion of the program is to commence is initially established. The audio and video portions of the recorded audio-video program are recovered, and the picture frame code numbers are extracted from the video portion thereof. The extracted picture frame numbers from the recovered video portion are then compared with the predetermined picture frame number, and audio evaluation of the audio portion of the program commences upon coincidence of the detected picture frame number and the predetermined picture number. Evaluation is effected by measuring predetermined audio characteristics of the recovered audio portion and comparing the measured characteristics with corresponding audio reference characteristics.Type: GrantFiled: September 30, 1982Date of Patent: July 1, 1986Assignee: Discovision AssociatesInventors: Edward Efron, James O. McPherson, Young B. Kim
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Patent number: 4524444Abstract: Method and means for evaluating the quality of audio and/or video transfer characteristics of a device upon which, or through which, audio and/or video information is contained, or passes, respectively. Both method and apparatus concern the evaluation of the quality of information transfer in the recording and playing back of a recording medium or in the transferring of audio and/or video information through an information handling device referred to as a throughput device. Unit evaluation is accomplished by establishing an input signal of known content, measuring selected parameters of selected parts of the input signal, feeding the input signal to the unit under test, measuring the parameters of parts of the output signal from the unit under test corresponding to the same selected parts of the input signal, and comparing the selected parameters of the input signal with the corresponding parameters of the output signal.Type: GrantFiled: September 30, 1982Date of Patent: June 18, 1985Assignee: Discovision AssociatesInventors: Edward Efron, James O. McPherson, Young B. Kim
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Patent number: 4455634Abstract: Method and means for evaluating the quality of audio and/or video transfer characteristics of a device upon which, or through which, audio and/or video information is contained, or passes, respectively. Both method and apparatus concern the evaluation of the quality of information transfer in the recording and playing back of a recording medium or in the transferring of audio and/or video information through an information handling device referred to as a throughput device. Unit evaluation is accomplished by establishing an input signal of known content, measuring selected parameters of selected parts of the input signal, feeding the input signal to the unit under test, measuring the parameters of parts of the output signal from the unit under test corresponding to the same selected parts of the input signal, and comparing the selected parameters of the input signal with the corresponding parameters of the output signal.Type: GrantFiled: September 30, 1982Date of Patent: June 19, 1984Assignee: Discovision AssociatesInventors: Edward Efron, James O. McPherson, Young B. Kim