Example methods and apparatus to detect audio engineering problems using identification of isolated watermarks are disclosed herein. Disclosed example methods include identifying, by executing an instruction with a processor, isolated watermarks in a first set of detected watermarks obtained from first media monitored at a first site. Disclosed example methods further include determining, by executing an instruction with the processor, a problem has been detected with the first media associated with the first set of detected watermarks in response to a first number of isolated watermarks identified in the first set of detected watermarks satisfying a first threshold.

A video quality assessment method and device are provided. The video quality assessment method includes: obtaining a to-be-assessed video, where the to-be-assessed video includes a forward error correction (FEC) redundancy data packet; when a quantity of lost data packets of a first source block in the to-be-assessed video is less than or equal to a quantity of FEC redundancy data packets of the first source block, generating a first summary packet for a non-lost data packet of the first source block, and generating a second summary packet for a lost data packet of the first source block; and calculating a mean opinion score of video (MOSV) of the to-be-assessed video based on the first summary packet and the second summary packet. The MOSV calculated according to the method is more consistent with real video experience of a user, so accuracy of video quality assessment can be improved.

Example methods and apparatus to detect audio engineering problems using identification of isolated watermarks are disclosed herein. Disclosed example methods include identifying, by executing an instruction with a processor, isolated watermarks in a first set of detected watermarks obtained from first media monitored at a first site. Disclosed example methods further include determining, by executing an instruction with the processor, a problem has been detected with the first media associated with the first set of detected watermarks in response to a first number of isolated watermarks identified in the first set of detected watermarks satisfying a first threshold.

An audio-video control system has a first AV displayer, a second AV displayer, a router and a processor. The first AV displayer is located in a first area and communicatively connected to a first device, and receives a first audio signal in the first area. The second AV displayer is located in a second area and communicatively connected to a second device, and receives a second audio signal in the second area. The router is communicatively connected to the first AV displayer and the second AV displayer. The processor processes the first audio signal to generate a first control signal and processes the second audio signal to generate a second control signal. The processor sends the first control signal to the first device via the router and the first AV displayer and sends the second control signal to the second device via the router and the second AV displayer.

An audio-video control system comprises a first audio sensor, a controller, an audio player, a first motion sensor and a processor. The first audio sensor receives a first audio signal in a first area when the first audio sensor is enabled. The controller determines whether the first audio sensor receives the first audio signal. The first motion sensor detects a motion of a first object in the first area to generate a first motion detecting signal. The controller enables the first audio sensor according to the first motion detecting signal. The processor controls the first and second devices via a local area network, controls the audio player to play an audio notifying signal according to the first motion detecting signal, and processes the first audio signal to obtain a control signal to selectively control the first device or the second device when the source of the first audio signal corresponds to the first account.

A test system for audio-video device comprises an output control circuit, a sensing circuit, a storage medium and a processor. The sensing circuit detects the sensible conditions of the AVDUT (Audio-Video Device Under Test). The storage medium stores a test script and a verification data set related to the AVDUT, wherein the test script comprises a plurality of test instructions, and each of the test instructions comprises a plurality of test signals. The processor is configured to generate a test sequence related to the test instructions, and outputs a plurality of control signals to the AVDUT through the output control circuit according to the test sequence, and the processor determines whether an abnormal event occurs in the AVDUT according to said sensible conditions, when the abnormal event occurs, the processor determines whether to update the test script according to a comparison result.

A test system for audio-video device comprises an output control circuit, a sensing circuit, a storage medium and a processor. The sensing circuit detects the sensible conditions of the AVDUT (Audio-Video Device Under Test). The storage medium stores a test script and a verification data set related to the AVDUT, wherein the test script comprises a plurality of test instructions, and each of the test instructions comprises a plurality of test signals. The processor is configured to generate a test sequence related to the test instructions, and outputs a plurality of control signals to the AVDUT through the output control circuit according to the test sequence, and the processor determines whether an abnormal event occurs in the AVDUT according to said sensible conditions, when the abnormal event occurs, the processor determines whether to update the test script according to a comparison result.

A system and method is provided for managing visual content. In one instance, an exemplary method includes receiving a stream of video fingerprints derived in a fingerprint generator by an irreversible data reduction process, from respective temporal regions within a particular visual content stream and at a fingerprint processor that is physically separate from the fingerprint generator via a communication network. The fingerprints are processed in the fingerprint processor to generate metadata which is not directly encoded in the fingerprints. Processing of the fingerprints includes windowing the stream of fingerprints with a time window, deriving frequencies of occurrence of particular fingerprint values or ranges of fingerprint values within each time window, determining statistical moments or entropy values of said frequencies of occurrence, comparing said statistical moments or entropy values with expected values for particular types of content, and generating metadata representing the type of the visual content.

A method of managing visual content. In one instance, the method includes receiving a stream of video fingerprints, derived in a fingerprint generator by an irreversible data reduction process, from respective temporal regions within a particular visual content stream and at a fingerprint processor that is physically separate from the fingerprint generator via a communication network. The fingerprints are processed in the fingerprint processor to generate metadata which is not directly encoded in the fingerprints. Processing of the fingerprints includes windowing the stream of fingerprints with a time window, deriving frequencies of occurrence of particular fingerprint values or ranges of fingerprint values within each time window, determining statistical moments or entropy values of said frequencies of occurrence, comparing said statistical moments or entropy values with expected values for particular types of content, and generating metadata representing the type of the visual content.

Example methods and apparatus to detect audio engineering problems using identification of isolated watermarks are disclosed herein. Disclosed example methods include identifying, by executing an instruction with a processor, isolated watermarks in a first set of detected watermarks obtained from first media monitored at a first site. Disclosed example methods further include determining, by executing an instruction with the processor, a problem has been detected with the first media associated with the first set of detected watermarks in response to a first number of isolated watermarks identified in the first set of detected watermarks satisfying a first threshold.