A method and apparatus for controlling a gain of an amplifier of a cable modem operating in a full duplex (FDX) mode. A cable modem includes an amplifier configured to amplify a received signal, a power meter configured to measure a power of the received signal on a plurality of channels, and a control unit configured to estimate a maximum expected power to receive on the plurality of channels based on the measured power and set a gain of the amplifier based on the maximum expected power. The cable modem is configured to operate in a full duplex mode. The channels include a full duplex upstream channel, a full duplex downstream channel, and a legacy downstream channel. The maximum expected power may be estimated via a sounding procedure. A power spectral density may be measured and the maximum expected power may be derived from the power spectral density.

A method and apparatus for controlling a gain of an amplifier of a cable modem operating in a full duplex (FDX) mode. A cable modem includes an amplifier configured to amplify a received signal, a power meter configured to measure a power of the received signal on a plurality of channels, and a control unit configured to estimate a maximum expected power to receive on the plurality of channels based on the measured power and set a gain of the amplifier based on the maximum expected power. The cable modem is configured to operate in a full duplex mode. The channels include a full duplex upstream channel, a full duplex downstream channel, and a legacy downstream channel. The maximum expected power may be estimated via a sounding procedure. A power spectral density may be measured and the maximum expected power may be derived from the power spectral density.

Techniques are described for expanding and/or improving the Advanced Television Systems Committee (ATSC) 3.0 television protocol in robustly delivering the next generation broadcast television services. In a boundary region between first and second broadcast stations in which a receiver can pick up signals from both stations, a primary tuner receiving signals from plural antennae presents a demanded service while a secondary tuner uses a single antenna to scan for duplicate transmissions of the service, and if one is found, the version with the better quality metrics may be presented.

Techniques are described for expanding and/or improving the Advanced Television Systems Committee (ATSC) 3.0 television protocol in robustly delivering the next generation broadcast television services. In a boundary region between first and second broadcast stations in which a receiver can pick up signals from both stations, a primary tuner receiving signals from plural antennae presents a demanded service while a secondary tuner uses a single antenna to scan for duplicate transmissions of the service, and if one is found, the version with the better quality metrics may be presented.

An automatic test method for testing functions of a device under test is disclosed. The automatic test method includes the following operations. A sample video is generated based on first sample photos and at least one second sample photo by a processor. The sample video is displayed by the device under test and test photos are generated based on the content of the displayed sample video captured by a camera. The first sample photos are compared with the test photos to generate a display compared result. A display error message or a display pass message is generated based on the display compared result by the processor, configured to indicate that whether a display function of the device under test is dysfunctional.

An automatic test method for testing functions of a device under test is disclosed. The automatic test method includes the following operations. A sample video is generated based on first sample photos and at least one second sample photo by a processor. The sample video is displayed by the device under test and test photos are generated based on the content of the displayed sample video captured by a camera. The first sample photos are compared with the test photos to generate a display compared result. A display error message or a display pass message is generated based on the display compared result by the processor, configured to indicate that whether a display function of the device under test is dysfunctional.

Systems, apparatuses, and methods are described for detecting malfunctions of computing devices causing outputs of video content. Partially or fully static content frames may be detected, and, indications may be generated based on the static content frames. The indications may be analyzed to identify computing devices with degraded performance. Diagnostic tests may be run by the identified computing devices and/or other actions performed based on a determination of static content frames.

Systems, apparatuses, and methods are described for detecting malfunctions of computing devices causing outputs of video content. Partially or fully static content frames may be detected, and, indications may be generated based on the static content frames. The indications may be analyzed to identify computing devices with degraded performance. Diagnostic tests may be run by the identified computing devices and/or other actions performed based on a determination of static content frames.

An estimation method suitable for a receiver and includes the following steps: calculating a relative signal-to-noise ratio, and determining whether the relative signal-to-noise ratio is higher than, lower than or within a threshold range; in response to determining that the relative signal-to-noise ratio is higher than the threshold range, estimating the signal quality indicator as a first preset value, wherein the first preset value represents a best signal quality; in response to determining that the relative signal-to-noise ratio is higher than the threshold range, estimating the signal quality indicator as a first preset value, wherein the first preset value represents a best signal quality; in response to determining that the relative signal-to-noise ratio is within the threshold range, estimating the signal quality indicator as an output value of a function according to a bit error rate, wherein an input value of the function is the relative signal-to-noise ratio.

An estimation method suitable for a receiver and includes the following steps: calculating a relative signal-to-noise ratio, and determining whether the relative signal-to-noise ratio is higher than, lower than or within a threshold range; in response to determining that the relative signal-to-noise ratio is higher than the threshold range, estimating the signal quality indicator as a first preset value, wherein the first preset value represents a best signal quality; in response to determining that the relative signal-to-noise ratio is higher than the threshold range, estimating the signal quality indicator as a first preset value, wherein the first preset value represents a best signal quality; in response to determining that the relative signal-to-noise ratio is within the threshold range, estimating the signal quality indicator as an output value of a function according to a bit error rate, wherein an input value of the function is the relative signal-to-noise ratio.