摘要:
A system and method for estimating noises in a frame is disclosed. A storage device is provided to store a previous frame prior to the frame. Multiple window noise estimators are provided to estimate noise between sub-regions of the frame and corresponding sub-regions of the previous frame for producing a noise estimation index and an adjusted noise estimation index for each sub-region. A comparator selects the minimum one among the adjusted noise estimation indexes and produces a corresponding window index. When the minimum adjusted noise estimation index is smaller than a threshold, a global motion detector outputs the noise index corresponding to the minimum adjusted noise estimation index for use as a noise estimation of the frame.
摘要:
A voltage control oscillator, outputting a clocking signal with a specific frequency according to an input voltage level, has a constant current source, a voltage/current converter, a current mirror and an oscillating circuit. The constant current source provides a predetermined reference current. The voltage/current converter is coupled to the constant current source, for determining a first current flowing through the voltage/current converter according to the input voltage. The current mirror has a first current terminal coupled to the constant current source, for determining a third current flowing through a second current terminal according to the second current flowing through the first current terminal, wherein the second current is the reference current subtracted by the first current. The oscillating circuit is coupled to the second current terminal of the current mirror, for determining a frequency of the clocking signal according to the third current.
摘要:
A method for detecting a defect of an optical disc includes steps of: confirming an optical pickup head being accessing data in a track on state; determining a defective region of the optical disc according to a peak-to peak value of a wobble signal; and, maintaining the optical pickup head being unchanged when the defective region is detected.
摘要:
A gamma correction method and system, which performs a gamma correction on an n-bit video signal to thus generate a gamma correction value. At first, a first primary index and a first sub-index are obtained by performing an index mapping on a value of the video signal. Next, a first gamma value is obtained by performing a table lookup on the first primary index and the first sub-index. Next, a second primary index and a second sub-index are obtained by performing the index mapping on the first gamma value. Next, multiple thresholds are obtained by performing the table lookup on the second primary index and the second sub-index. Finally, the value of the video signal and the multiple thresholds are compared to accordingly correct the first gamma value and generate the gamma correction value.
摘要:
A variable capacitance applied to a voltage controlled oscillator includes a switch capacitance bank including a plurality of controllable capacitor paths for selectively connected between a first node and a second node in parallel; and, a switch variactor bank including a plurality of controllable variactor paths for selectively connected between the first node and the second node in parallel; wherein each controllable variactor path provides a tunable capacitance value according to an input voltage.
摘要:
A programmable memory includes N number of one-time programmable (OTP) memory rows, an output module, a judge module, and a write-in module. The output module receives all data of the OTP memory rows and generates output data. The judge module receives the output data and write-in data and generates write-in control data according to the output data and the write-in data. When a bit datum of the output data is different to a bit datum of the write-in data, the bit of the write-in control data is enabled. The write-in module receives the write-in control data and stores a preset bit datum in an unprogrammed OTP memory cell of an OTP memory row corresponding to the enabled bit.
摘要:
A decoding device for decoding a product code and a decoding method using the same are provided. The decoding device comprises an erasure flag processor, a decoder and a confidence flag processor. The erasure flag processor determines to set a particular value or a non-particular value for each erasure flag according to a plurality of the confidence flags, wherein each symbol has a confidence flag and an erasure flag correspondingly and each confidence flag has a confidence flag value. The decoder is coupled to the erasure flag processor to correct the symbols according to the erasure flags and outputs the corrected symbols. The confidence flag processor is coupled to both the erasure flag processor and the decoder to reset the confidence flag values of the confidence flags according to the erasure flags and the corrected symbols.
摘要:
A channel assigning method for ad-hoc networks, which uses an intra-cluster bandwidth reserving procedure, including six phases of reservation request RREQ, reservation response RRSP, code assignment CASN, code conflict detection CCD, code conflict report CCR and code confirmation CCFM, and an inter-cluster RTS-CTS (request to send-clear to send) dialogue protocol to generate a TDMA time slot and select an assignment code, thereby supporting real-time traffic and associated QoS guarantee in a multi-hop ad-hoc network.
摘要:
A limit switch controlling method and apparatus used in an optical drive are disclosed. When the optical drive is executing a tray-in/tray-out action or a move-sled home action, a detect-tray-in-switch pin, a detect-tray-out-switch pin, or a detect-sled-limit-switch pin of a controlling chip is used to receive a signal from a limit switch. When the optical drive is not executing the tray-in/tray-out action or the move-sled-home action, the detect-tray-in-switch pin, the-detect tray-out-switch pin, or the detect-sled-limit-switch pin of the controlling chip is used as an I/O port.
摘要:
A function reference method of a development tool and a system thereof are disclosed. According to the function reference method, new function database and classified data are described with a text file or a database format file. After the file is read by an add-in module of the development tool, the desired function or object can be loaded into the editing workspace of the development tool through a hierarchical menu or by detecting an input string. Therefore, users can quickly searching and loading new functions.