Abstract: A modulation scheme detecting apparatus for determining a target modulation scheme used for demodulating a received signal and a related method are disclosed. The modulation scheme detecting apparatus includes: a first power estimating module, for evaluating a first nominal power of the received signal rotated by a first predetermined phase according to a first modulation scheme; a second power estimating module, for evaluating a second nominal power of the received signal rotated by a second predetermined phase according to a second modulation scheme; and a decision module, coupled to the first power estimating module and the second power estimating module, for selecting the target modulation from the first and second modulation schemes according to the first nominal power and the second nominal power.

Abstract: According to the claimed invention, a bit error probability (BEP) estimating system and method for determining the BEP of a received signal are disclosed. The BEP estimating system includes: a soft equalizer for generating a plurality of soft outputs according to the received signal; a calibration apparatus for deriving a first parameter and a second parameter, wherein the second parameter is relative to the first parameter; and a computing module, coupled to the soft equalizer and selectively coupled to the calibration apparatus, for determining the BEP according to the soft outputs, the first parameter, and the second parameter.

Abstract: A method for analyzing the reliability of a flag value carried by a current block is disclosed. The method includes: determining whether the current block is a dummy block, and determining the flag value as invalid if the current block is determined as a dummy block. The step of determining the current block is a dummy block can be implemented through two methods. The first method is to utilize information (signal quality indicators) of the current block and a previous block to perform the dummy block determination. The second method is to only utilize information (including the signal quality indicators and coded USF correction indicators) of the current block to generate a determination value through substituting the information into a predetermined equation, and to perform the dummy block detection according to the determination value.

Abstract: An apparatus and method for frequency synchronization is proposed to obtain the pilot tones and evaluate the frequency offset and time offset for frequency synchronization. The frequency synchronization method has the following steps: filtering a baseband signal of a frequency correction burst by using multiple pre-filters; measuring the baseband signal and the signals output from the pre-filters to produce the first power value and the second power values respectively; normalizing the maximum second power value by using the first power value so as to produce the first detection value; using the samples of the baseband signal at different time points and a predetermined mathematical function to produce the second detection value; combining the first and second detection values to produce the third detection value; and using the third detection value to determine whether the frequency correction burst is received or not.

Abstract: The present invention describes several embodiments of optical systems for the projection of images formed on reflective liquid crystal light valves. These light valves are capable of high resolution and very small sizes. The optical systems described are able to project these images with highly efficient utilization of light from an arc lamp source and are also very compact and easy to manufacture.

Abstract: A method and apparatus for enhancing the contrast ratio of images generated on rear projection screens is disclosed. This invention provides a method of rejecting most of the scattered ambient light from both the front and the back of a rear projection screen. Polarizing films and retardation sheets are used to enhance the contrast and reject ambient light to decrease the dark state brightness in a rear projection system.

Abstract: The present invention describes several embodiments of optical systems for the projection of images formed on reflective liquid crystal light valves. These light valves are capable of high resolution and very small sizes. The optical systems described are able to project these images with highly efficient utilization of light from an arc lamp source and are also very compact and easy to manufacture.

Abstract: To produce a print from digital image data, the image data is used to generate a display of the image on a display device, such as a reflective LCD, a digital mirror, or a TFT active matrix LCD. The displayed image is separately exposed to each of red, green and blue light, which is preferably polarized. The exposed image is projected onto photosensitive paper or film, and the duration of the exposure is controlled during projection.