Disclosed is a method for automatically adjusting synchronization of sound and picture of TV. The method includes: obtaining a video, determining whether the video contains an adjustment video clip corresponding to a preset video database; obtaining audio information of the adjustment video clip and a time point corresponding to the audio information if the video contains the adjustment video clip corresponding to the preset video database; comparing the audio information of the adjustment video clip and the time point corresponding to the audio information with a standard video in the preset video database, and determining whether there is a synchronization delay between the sound and the picture; and synchronizing the sound and the picture of the video if there is the synchronization delay between the sound and the picture. A device for automatically adjusting synchronization of sound and picture of TV and a computer readable storage medium are further disclosed.

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.

Systems, methods, and algorithms for estimating the sample clock difference between an audio playback and recording device are described. The sample clock difference can be determined by sequentially playing the same pseudorandom signal and exploiting the statistical properties of said signal in the recording. An exemplary embodiment utilizes a maximum length sequence (MLS) for the pseudorandom signal. While an MLS sequence is a good choice for clock synchronization, it is possible to use other pseudorandom sequences. The sequence preferably has a sharp correlation peak that is clearly discernable with even a single sample shift and be of sufficient length to support the anticipated clock drift.

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 resonant testing system for testing a device under test, including a processing circuit, a microphone array and a camera is disclosed. The processing circuit generates a scanning frequency signal and transmits the scanning frequency signal to the device under test, which plays sound based on the scanning frequency signal. The microphone array includes several microphones, each of the microphones receives the sound played by the device under test, and the microphone array outputs several audio signals corresponding to the microphones. The camera captures a real time image signal of the device under test, and transmits the real time image signal to the processing circuit. The processing circuit computes resonant positions and resonant levels according to the audio signals, and combines the resonant positions, the resonant levels and the real time image signal to generate a real time resonant result. A resonance testing method is disclosed.

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.

A sound inspection method of a display device and a sound inspection device including preparing a display device including a display panel and a sound generator disposed on a first surface of the display panel, placing a vibration sensor on a second surface opposite to the first surface of the display panel, vibrating the sound generator at a first reference frequency, vibrating the display panel, and then sensing a vibration of the vibration sensor that vibrates along with a vibration of the display panel; and determining whether a frequency of the vibration of the vibration sensor is included in a first threshold frequency region.

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.

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 method, apparatus and computer program product are provided to facilitate calibration of an audio playback system with a video presented upon a display. In the context of a method, information about a display from a first location is received. The method also includes determining an angle of the display based upon the received information about the display and the first location. The method further includes causing an audio playback system associated with the display to be calibrated based upon a modified azimuth of a source of audio signals based upon the determined angle. A corresponding apparatus and computer program product are also provided.