Source: http://www.google.es/patents/US9124769
Timestamp: 2017-10-20 20:11:18
Document Index: 724746201

Matched Legal Cases: ['Application No. 61', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2000', 'Application No. 98806840', 'Application No. 00114272', 'Application No. 00114272', 'Application No. 07017129', 'Application No. 07017129', 'Application No. 98933309', 'Application No. 00114271', 'Application No. 00114271', 'Application No. 00114272', 'Application No. 00114272', 'Application No. 00114272', 'Application No. 97947628', 'Application No. 97947628', 'Application No. 98933309', 'Application No. 98933309', 'Application No. 98933309', 'Application No. 98933309', 'Application No. 97947628', 'Application No. 00114271', 'Application No. 97926814', 'Application No. 97947628', 'Application No. 00114271', 'Application No. 00114272', 'Application No. 97926814', 'Application No. 97926814', 'Application No. 07017129', 'Application No. 00114271', 'Application No. 00114272', 'Application No. 07017129', 'Application No. 97926814', 'Application No. 98933309', 'Application No. 00114271', 'Application No. 00114271', 'Application No. 98933309', 'art 2', 'Application No. 1812', 'Application No. 2003262297', 'Application No. 2006325808', 'Application No. 31489', 'Application No. 46028', 'Application No. 71525', 'Application No. 71526', 'Application No. 71527', 'Application No. 82980', 'Application No. 52668', 'Application No. 2006325808', 'Application No. 31489', 'Application No. 2006325808', 'Application No. 31489', 'Application No. 52668', 'Application No. 57828', 'Application No. 57830', 'Application No. 57831', 'Application No. 57832', 'Application No. 71524', 'Application No. 71526', 'Application No. 71527', 'Application No. 71524', 'Application No. 2000', 'Application No. 2003', 'Application No. 2000', 'Application No. 10', 'Application No. 2003', 'Application No. 2000', 'Application No. 2000', 'Application No. 2000', 'Application No. 10', 'Application No. 97182123', 'Application No. 200680052652', 'Application No. 200810091335', 'Application No. 200680052652', 'Application No. 200310123387', 'Application No. 200680052652', 'Application No. 200810091335', 'Application No. 97181455', 'Application No. 97182123', 'Application No. 98806840', 'Application No. 200680052652', 'Application No. 97182123', 'Application No. 97182123', 'Application No. 97181455', 'Application No. 98806840', 'Application No. 200310123387', 'Application No. 200310123387', 'Application No. 2006800526523', 'Application No. 97181455', 'Application No. 98806840', 'Application No. 2000']

Patente US9124769 - Methods and apparatus to verify presentation of media content - Google Patentes
Example methods and apparatus to verify presentation of media content are disclosed. A disclosed example apparatus for use with a set-top box (STB) and a media presentation device includes an audio input interface to receive a first audio signal associated with a program selected by a user via the STB,...http://www.google.es/patents/US9124769?utm_source=gb-gplus-sharePatente US9124769 - Methods and apparatus to verify presentation of media content
Número de publicación US9124769 B2
Número de solicitud US 12/505,966
También publicado como US20100115573, US20150373406
Número de publicación 12505966, 505966, US 9124769 B2, US 9124769B2, US-B2-9124769, US9124769 B2, US9124769B2
Inventores Venugopal Srinivasan, Arun Ramaswamy
Citas de patentes (485), Otras citas (255), Citada por (3), Clasificaciones (14), Eventos legales (2)
US 9124769 B2
1. An apparatus for use with a set-top box (STB) and a media presentation device, comprising:
an audio input interface to receive a first audio signal associated with a program selected by a user via the STB;
a microphone to receive a free-field radiating second audio signal output by at least one of the media presentation device or an audio system associated with the media presentation device;
a finite impulse response filter having adaptive coefficients to delay and to attenuate the first audio signal to form an estimate of the second audio signal;
a comparator to compare the second audio signal to the estimate of the second audio signal to form an output;
a privacy protector to facilitate burst mode operation of the comparator by periodically disabling the microphone and the comparator; and
an output interface to provide a value indicative of whether the program selected by the user via the STB is presented at the media presentation device based on the output.
2. An apparatus as defined in claim 1, further including:
a first externally-exposed connector to communicatively couple the first audio signal from the STB to the apparatus via a first cable;
a second externally-exposed connector to communicatively couple the first audio signal from the apparatus to the media presentation device via a second cable; and
a third externally-exposed connector to provide the value via a third cable.
3. An apparatus as defined in claim 1, further including an audio output interface to provide the received first audio signal to the media presentation device.
4. An apparatus as defined in claim 1, further including a first housing to contain the audio input interface, the microphone, the comparator and the output interface, wherein the first housing is distinct from a second housing to contain the STB and is also distinct from a third housing to contain the media presentation device.
5. An apparatus as defined in claim 1, further including a first housing to contain the audio input interface, the microphone, the comparator, the output interface and the STB, and a second housing to contain the media presentation device.
6. An apparatus as defined in claim 1, wherein the value indicates a first logic state when the program selected via the STB is output via the media presentation device and indicates a second logic state when the program selected via the STB is not output via the media presentation device.
7. An apparatus as defined in claim 1, wherein the comparator includes an echo canceller, and wherein the output of the comparator represents a magnitude of a residual signal.
8. An apparatus as defined in claim 1, wherein the comparator includes a subtractor to subtract the estimate of the second audio signal from the second audio signal to form a residual signal.
9. An apparatus as defined in claim 8, wherein the comparator further includes an adapter to adjust at least one of the adaptive coefficients to reduce the magnitude of the residual signal.
10. An apparatus as defined in claim 8, wherein the comparator further includes a thresholder to compare an absolute value of the residual signal to a threshold to form the output of the comparator.
11. An apparatus as defined in claim 1, wherein the apparatus is to be installed in-line between an audio output jack of the STB and an audio input jack of the media presentation device.
12. An apparatus as defined in claim 1, wherein the comparator selects the delay and attenuation based on a maximum coefficient magnitude of the adaptive coefficients.
13. An apparatus as defined in claim 1, wherein the filter is to set the adaptive coefficients to zero when the microphone is enabled.
14. An apparatus for use with a set-top box (STB) and a media presentation device comprising:
a comparator to compare the second audio signal to the first audio signal to form an output;
an output interface to provide a value indicative of whether the program selected by the user via the STB is presented at the media presentation device based on the output; and
a privacy protector including a timer to facilitate burst mode operation of the comparator by periodically disabling the microphone and the comparator.
15. A method to verify presentation at a media presentation device of media selected at a tuning device, comprising:
enabling a microphone to obtain a free-field radiating first audio signal output by the media presentation device;
implementing a privacy protocol by facilitating burst mode operation of the microphone, the burst mode operation to periodically disable the obtaining of the first audio signal;
applying a filter to a second audio signal associated with the media received at the tuning device to form an estimate of the first audio signal by delaying and attenuating the second audio signal;
comparing the first audio signal to the estimate of the first audio signal to form an output representative of whether the estimate of the first audio signal is present in the first audio signal; and
providing a value indicative of whether the media received by the tuning device was presented at the media presentation device based on the output.
16. A method as defined in claim 15, wherein comparing the first audio signal to the estimate of the first audio signal includes:
subtracting the estimate of the first audio signal from the first audio signal to form a residual signal; and
comparing the residual signal to a threshold.
17. A method as defined in claim 15, wherein comparing the first audio signal to the estimate of the first audio signal includes:
subtracting the estimate of the first audio signal from the first audio signal to form a residual signal;
updating a coefficient of the filter based on the residual signal;
computing a difference between a first magnitude of a first of the coefficients to a second magnitude of a second of the coefficients; and
18. A method as defined in claim 15, further including disabling the receiving of the first audio signal after the filter has converged its filter coefficients.
19. A method to verify presentation at a media presentation device of media selected at a tuning device, the method comprising:
receiving a first audio signal associated with the media received at the tuning device;
receiving a free-field radiating second audio signal output by the media presentation device;
implementing a privacy protocol by:
discontinuing the receiving of the second audio signal;
initializing a timer; and
restarting the receiving of the second audio signal when the timer expires;
comparing the second audio signal to an estimate of the second audio signal to form an output representative of whether the estimate of the second audio signal is present in the second audio signal; and
20. A method as defined in claim 19, wherein applying the filter to the first audio signal to form the estimate of the second audio signal includes delaying and attenuating the first audio signal.
21. A tangible machine-readable storage device or storage disc comprising instructions which, when executed, cause a machine to at least:
obtain, via a transducer, free-field radiating first audio signals output by a media presentation device;
implement a privacy protocol by facilitating burst mode operation of the transducer, the burst mode operation to periodically disable the transducer from obtaining the first audio signals;
apply a filter to a second audio signal associated with media received at a tuning device to form an estimate of the first audio signal, the filter to delay and to attenuate the second audio signal;
compare the first audio signal to the estimate of the first audio signal to form an output representative of whether the estimate of the first audio signal is present in the second first audio signal; and
provide a value indicative of whether the media received by the tuning device was presented at the media presentation device based on the output.
22. A machine-readable storage device or storage disc as defined in claim 21, wherein the machine-readable instructions, when executed, cause the machine to:
subtract the estimate of the first audio signal from the first audio signal to form a residual signal; and
compare the residual signal to a threshold.
23. A machine-readable storage device or storage disc as defined in claim 21, wherein the machine-readable instructions, when executed, cause the machine to compare the first audio signal to the estimate of the first audio signal by:
24. A machine-readable storage device or storage disc as defined in claim 21, wherein the machine-readable instructions, when executed, cause the machine to implement the privacy protocol by:
discontinuing the receiving of the first audio signal;
restarting the receiving the first audio signal when the timer expires.
25. An apparatus for use with a set-top box and a media presentation device comprising:
a transducer to receive a free-field radiating first audio signal output by the media presentation device;
a filter having adaptive weights to receive a second audio signal associated with a program selected by a user from an audio output line of the set-top box, and to process the second audio signal to generate a delayed and attenuated third audio signal;
a difference detector to subtract the third audio signal from the first audio signal to form a residual signal;
a privacy protector including a timer to facilitate burst mode operation by periodically disabling the transducer from receiving the first audio signal; and
a comparator to form a value indicative of whether the program selected by the user via the set-top box is presented at the media presentation device based on the residual signal.
This patents claims the benefit of U.S. Provisional Patent Application No. 61/110,274, entitled “Methods and Apparatus to Monitor Media Content,” and filed Oct. 31, 2008, which is hereby incorporated by reference in its entirety.
To allow the in-line presentation verification device 400 to be user and/or technician installed between the STB 215 and the media presentation device 210, the example in-line presentation verification device 400 of FIG. 4 includes connectors C1, C2 and C3. The example connector C1 of FIG. 1 is to electrically couple the audio signal Xc from an audio-out jack and/or connector of the STB 215 to the comparator 325 via a first cable. As shown in FIG. 4, the audio signal Xc received via the connector C1 is also passed through and output via the example connector C2. The example connector C2 of FIG. 4 is to electrically couple the audio signal Xc to an audio-in jack and/or connector of the media presentation device 210 via a second cable. As illustrated in FIG. 4, the in-line presentation verification device 400 of FIG. 4 may be installed in-line between the audio-out jack of the STB 215 and the audio-in jack of the media presentation device 210. Example connectors that may be used to implement the connectors C1 and C2 include, but are not limited to, an RCA connector, an high-definition multimedia interface (HDMI) connector, a tip-sleeve (TS) connector and/or a tip-ring-sleeve (TRS) connector.
X T = ∑ m = 0 m = M - 1 W m Z m , EQN ( 1 )
To adapt the filter coefficients 515, the example comparator 325 of FIG. 5 includes a coefficient adapter 520. The example coefficient adapter 520 adjusts the filter coefficients 515 to minimize the difference X0 between the audio signal Xd and the filtered audio signal XT. That is, the coefficient adapter 520 operates to substantially minimize the residual signal X0. In some example, the initial values of the filter coefficients 515 are set to zero when the microphone 310 is enabled. Additionally or alternatively, the values of the filter coefficients 515 can be frozen, fixed and/or retained while the microphone 310 is disabled. The example coefficient adaptor 520 adjusts the filter coefficients 515 by applying the following equation:
W m(n+1)=W m(n)+μX 0 X m(n), EQN (2)
An example implementation uses a 16 kHz sampling rate (any desired sampling rate may be used) and uses M=400 filter coefficients 515 W0 through WM-1, supporting a maximum time delay of 25 milliseconds between the audio signal Xc and the audio signal Xd. If the audio Xd picked up by the microphone 310 predominantly corresponds to the audio signal Xc, the filter weights 515 readily adapt themselves to substantially stationery values and the error signal X0 decreases to a low value in approximately one second. The extent to which the residual signal X0 is not zero may depend on any number and/or type(s) of factors, such as the presence of ambient noise in the viewing area 235, quantization noise, computation noise, finite-precision arithmetic effects, etc. When the audio Xd is different from the audio Xc, the adaptation process will not be able to substantially reduce and/or minimize the error signal X0. Therefore, by comparing the error signal X0 energy with a threshold (e.g., a predetermined threshold), the comparator 325 can determine whether the audio 255 emanating from the speakers matches the tuner audio Xc. When a good match is identified, the comparator 325 can also analyze the distribution of filter coefficients to determine whether one filter coefficient has a magnitude that is greater than all the other coefficients, as depicted in FIG. 6.
While an example manner of implementing the example comparators 325 of FIGS. 3 and 4 has been illustrated in FIG. 5, one or more of the interfaces, data structures, elements, processes and/or devices illustrated in FIG. 5 may be combined, divided, re-arranged, omitted, eliminated and/or implemented in any other way. For example, the subtractor 525 and the filter 505 may be implemented in the same or separate integrated circuits. Further, the example filter 505, the example delay line 510, the example filter coefficients 515, the example summer 518, the example coefficient adapter 520, the example subtractor 525, the example thresholder 530 and/or, more generally, the example comparator 325 of FIG. 5 may be implemented by hardware, software, firmware and/or any combination of hardware, software and/or firmware. Thus, for example, any of the example filter 505, the example delay line 510, the example filter coefficients 515, the example summer 518, the example coefficient adapter 520, the example subtractor 525, the example thresholder 530 and/or, more generally, the example comparator 325 may be implemented by one or more circuit(s), programmable processor(s), ASIC(s), PLD(s), FPLD(s), and/or FPGA(s), etc. When any claim of this patent incorporating one or more of these elements is read to cover a purely software and/or firmware implementation, at least one of the example filter 505, the example delay line 510, the example filter coefficients 515, the example summer 518, the example coefficient adapter 520, the example subtractor 525, the example thresholder 530 and/or, more generally, the example comparator 325 are hereby expressly defined to include a tangible computer-readable medium. Example tangible computer-readable media include, but are not limited to, a flash memory, a CD, a DVD, a floppy disk, a ROM, a RAM, a PROM, an EPROM, and/or an EEPROM, an optical storage disk, an optical storage device, magnetic storage disk, a magnetic storage device, and/or any other tangible medium that can be used to store program code and/or instructions in the form of machine-readable instructions or data structures, and which can be accessed by a processor, a computer and/or other machine having a processor, such as the example processor platform P100 discussed below in connection with FIG. 9. Combinations of the above are also included within the scope of tangible computer-readable media. Further still, the example comparator 325 may include interfaces, data structures, elements, processes and/or devices instead of, or in addition to, those illustrated in FIG. 5, and/or may include more than one of any or all of the illustrated interfaces, data structures, elements, processes and/or devices.
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