Abstract: A High-Definition Multimedia Interface (HDMI) signal detection method is provided. The HDMI signal detection method may be applied to an apparatus (e.g., a sink device). The HDMI signal detection method may include the following steps. The apparatus may receive input data from a source apparatus through an HDMI standard, wherein the input data comprises a plurality of data sets. Then, the apparatus may compare each data set to a predefined reference pattern according to a slide window with the predefined reference pattern to generate a comparison result. Then, the apparatus may determine whether the total match count corresponding to the comparison result is less than a threshold to determine the HDMI standard corresponding to the input data.

Abstract: A clock control method for a High Definition Multimedia Interface (HDMI) receiver operating in a power-saving mode in a sink device is provided. The HDMI receiver has a first module, a second module, and a third module. The clock control method includes the following stages. A clock signal is enabled to be sent to the first module and the third module during a first region of received data. The clock signal is disabled to be sent to the second module during the first region of the received data. The clock signal is enabled to be sent to the third module and the clock signal is disabled to be sent to the first module and the second module during a second region of the received data.

Abstract: A channel hiatus correction method for an HDMI device is provided. A recovery code from scrambled data of the stream is obtained. A liner feedback shift register (LFSR) value of channels of the HDMI port is obtained based on the recovery code and the scrambled data of the stream. The stream is de-scrambled according to the LFSR value of the channels of the HDMI port. Video data is displayed according to the de-scrambled stream.

Abstract: A channel hiatus correction method for an HDMI device is provided. A recovery code from scrambled data of the stream is obtained. A liner feedback shift register (LFSR) value of channels of the HDMI port is obtained based on the recovery code and the scrambled data of the stream. The stream is de-scrambled according to the LFSR value of the channels of the HDMI port. Video data is displayed according to the de-scrambled stream.

Abstract: A power-saving method for an HDMI device is provided. The method includes detecting color depth information of video data from an HDMI source which is connected to the HDMI port, deriving a horizontal length for each line by fragment of a picture frame according to the color depth information, generating a plurality of synchronization signals according to the horizontal length for each line by fragment, and powering on the HDMI port, according to the synchronization signals, for a predetermined time period to obtain encrypted information from the HDMI source, and powering off the HDMI port after the predetermined time period.

Abstract: A power-saving method for switching High Definition Multimedia Interface (HDMI) ports on a sink device is provided. The sink device has a first HDMI port initially being enabled for displaying and a second HDMI port being disabled for displaying. The power-saving method includes the steps of using the reference signals to locate the VSYNC active edge in each frame generated by a source device connected to the second HDMI port; turning on the power to the second HDMI port during a power-on region corresponding to the VSYNC active edge in each frame and turning off power otherwise; obtaining information related to a high bandwidth digital content protection (HDCP) in the power-on region; and displaying video data from the source device based on the HDCP information when enabling the second HDMI port connected to the source device.

Abstract: A word boundary detection method includes receiving a data stream from a data channel of a high definition multimedia interface (HDMI), and performing pattern matching upon the data stream to identify a word boundary between two consecutive codewords transmitted via the data stream. Known codewords of scrambled control vectors are involved in the pattern matching.

Abstract: A word boundary detection method includes receiving a data stream from a data channel of a high definition multimedia interface (HDMI), and performing pattern matching upon the data stream to identify a word boundary between two consecutive codewords transmitted via the data stream. Known codewords of scrambled control vectors are involved in the pattern matching.

Abstract: An apparatus for eliminating impulse interference includes an impulse interference detecting unit, an impulse interference eliminating unit and a control unit. The impulse interference detecting unit detects whether impulse interference exists in an input signal according to a predetermined condition, and generates an impulse interference eliminating request when having detected that the input signal satisfies the predetermined condition. In response to the impulse interference eliminating request, the impulse interference eliminating unit performs an impulse interference eliminating process on the input signal to generate an output signal. According to an output signal quality index associated with the output signal, the control unit selectively adjusts the predetermined condition used for detecting whether the impulse interference exists.

Abstract: A signal receiving end of a digital television includes: an analog-to-digital converter (ADC), converting an input signal from an analog format to a digital format, the input signal including a target signal and an interference signal; a digital gain control circuit, coupled to the ADC, adjusting an amplitude of the target signal according to a gain; a detecting module, coupled to the digital gain control circuit, detecting a variance in the gain to generate a detection value; and a control circuit, coupled to the digital gain control circuit, determining a gain setting parameter according to the detection value. Wherein, the digital gain control circuit further updates the gain according to the gain setting parameter.

Abstract: A signal receiving end of a digital television includes: an analog-to-digital converter (ADC), converting an input signal from an analog format to a digital format, the input signal including a target signal and an interference signal; a digital gain control circuit, coupled to the ADC, adjusting an amplitude of the target signal according to a gain; a detecting module, coupled to the digital gain control circuit, detecting a variance in the gain to generate a detection value; and a control circuit, coupled to the digital gain control circuit, determining a gain setting parameter according to the detection value. Wherein, the digital gain control circuit further updates the gain according to the gain setting parameter.

Abstract: By inserting a symbol start tag at a start of a data segment corresponding to each symbol of a multimedia data stream, and by inserting frame start tags at starts of different frames in a start data segment, data signals belonging to different channels can be precisely and rapidly classified and decoded when the multimedia data stream is performed with demodulation.

Abstract: By determining a scaling factor for scaling signals according to a signal having low bit error rates, and by adjusting soft data using the scaling factor, when soft data are simulated using the Gaussian Model having obvious errors with respect to reality, impacts of signals having low bit error rates are effectively amplified so that impacts of signals having high bit error rates are effectively reduced on the contrary. As a result, the obvious errors introduced by using the Gaussian Model and a low broadcast quality of digital television signals caused by said obvious errors can be neutralized.

Abstract: An apparatus for eliminating impulse interference includes an impulse interference detecting unit, an impulse interference eliminating unit and a control unit. The impulse interference detecting unit detects whether impulse interference exists in an input signal according to a predetermined condition, and generates an impulse interference eliminating request when having detected that the input signal satisfies the predetermined condition. In response to the impulse interference eliminating request, the impulse interference eliminating unit performs an impulse interference eliminating process on the input signal to generate an output signal. According to an output signal quality index associated with the output signal, the control unit selectively adjusts the predetermined condition used for detecting whether the impulse interference exists.

Abstract: By determining a scaling factor for scaling signals according to a signal having low bit error rates, and by adjusting soft data using the scaling factor, when soft data are simulated using the Gaussian Model having obvious errors with respect to reality, impacts of signals having low bit error rates are effectively amplified so that impacts of signals having high bit error rates are effectively reduced on the contrary. As a result, the obvious errors introduced by using the Gaussian Model and a low broadcast quality of digital television signals caused by said obvious errors can be neutralized.

Abstract: By inserting a symbol start tag at a start of a data segment corresponding to each symbol of a multimedia data stream, and by inserting frame start tags at starts of different frames in a start data segment, data signals belonging to different channels can be precisely and rapidly classified and decoded when the multimedia data stream is performed with demodulation.