Abstract: In relation to search positions within a search range determined with a reference image block located in the same position as a standard block of interest, correlation computation is performed by parallel processing under a pipeline method through use of a plurality of correlation computing units. A correlation extreme value is searched while the center position is sequentially moved on the basis of a predetermined search position setting standard according to the result of correlation computation. Further, sub-sampled image data for a plurality of channels corresponding to the search positions are retained in system memory for a plurality of channels, and correlation computation is performed in connection with search positions through parallel processing under a pipeline method through use of the plurality of correlation computing units.

Abstract: A method for selecting a compression setting to use during a communications session to compress streaming video data includes the steps of determining processor performance data for at least one processor, determining a video data acquisition rate, and using the processor performance data and the acquisition rate to identify a compression setting for the data communications session.

Abstract: A moving picture processor includes a first detector configured to detect a reference block most similar to a target block for which motion is to be detected and which is set in a current picture, and to generate a first motion vector candidate indicating a relative position between the target block and the reference block. A second detector is configured to detect a first reference area most similar to a first target area obtained by combining the target block and a first adjacent block adjacent to the target block, and to generate a second motion vector candidate indicating a relative position between the first target area and the first reference area. A determination circuit is configured to determine a motion vector for the target block, based on the first and second motion vector candidates.

Abstract: A video encoding apparatus comprises a frame memory/predictive image generator having a first predictive mode for generating a predictive image signal by selecting a combination from among a plurality combinations of a reference image number and a plurality of predictive parameters, and a second predictive mode for generating a predictive image signal according to a predictive parameter computed based on reference image numbers of reference images and an image-to-image distance, and a variable-length encoder to select one of the first and second prediction modes by the number of reference images, and encode orthogonal transformation coefficient information concerning a predictive error signal of a predictive image signal with respect to input video signal, mode information indicating an encoding mode, motion vector information and combination of selected reference image number with predictive parameter index information indicating combination of selected reference image information.

Abstract: A video encoding apparatus comprises a frame memory/predictive image generator having a first predictive mode for generating a predictive image signal by selecting a combination from among a plurality combinations of a reference image number and a plurality of predictive parameters, and a second predictive mode for generating a predictive image signal according to a predictive parameter computed based on reference image numbers of reference images and an image-to-image distance, and a variable-length encoder to select one of the first and second prediction modes by the number of reference images, and encode orthogonal transformation coefficient information concerning a predictive error signal of a predictive image signal with respect to input video signal, mode information indicating an encoding mode, motion vector information and combination of selected reference image number with predictive parameter index information indicating combination of selected reference image information.

Abstract: A method and apparatus are provided for coding or decoding an image comprising macro-blocks which are distributed in lines and columns. The processing of at least one given macro-block requires the pre-processing of at least one other macro-block on which said dependent macro-block depends. Moreover, the macro-blocks are processed sequentially line by line or column by column. Processing of the macro-blocks is multithreaded over N processors, N?2. The image is separated into N vertical bands each comprising a plurality of lines and at least one column of macro-blocks if the macro-block is processed sequentially line by line, or into N horizontal bands each comprising a plurality of columns and at least one line of macro-blocks if the macro-block is processed sequentially column by column. One of the N bands is processed by each processor, and the processing operations performed by the N processors is synchronized.

Abstract: A method of creating a variable-shaped block in a target image includes generating an initial pattern of target blocks, identifying allowable combinations of target blocks, calculating a combination value for each allowable combination, using the combination value to select one of the allowable combinations, and performing the selected allowable combination to create a variable-shaped block.

Abstract: A video decoding method and apparatus receives a motion compensation shader command, such as a packet, for a programmable shader of a 3D pipeline, such as programmable vertex shaders and pixel shaders, to provide motion compensation for encoded video, and decode the encoded video using the programmable shader of the 3D pipeline. As such, the programmable shader of a 3D pipeline is used to provide motion compensated video decoding as opposed to, for example, dedicated hardware, thereby, among other advantages, eliminating the need for the dedicated hardware.

Abstract: The disclosure is directed to a video slicing technique that promotes low complexity, bandwidth efficiency and error resiliency. A video encoder places an RM close to the beginning of each logical transmission unit (LTU) so that all but a very small end segment of each video slice fits substantially within an LTU. Instead of requiring placement of RMs exactly at the LTU boundaries, a video encoder applies an approximate alignment technique. Video slices are encoded so that RMs are placed close to the beginning of each LTU, e.g., at the end of the first MB falling within the LTU. A portion of the last MB from the preceding slice carries over into the next LTU. Loss of an LTU results in loss of virtually the entire current slice plus a very small portion of the previous slice.

Abstract: A module may provide codec-independent services including determining frame display order, frame dependency sets, and queuing the dependency frames in advance so as to enable display of a video. The module enables a video to be played forwards or backwards at a variety of playback speeds from any position within the video. In one implementation, a device communicatively coupled to a plurality of decoders accesses a video that includes a plurality of frames. One or more of the frames are decodable by one or more of the communicatively coupled decoders. The device identifies a frame in the video that is to be displayed, and determines a plurality of dependency frames in the video upon which decoding of the frame to be displayed depends. The device provides an indication that one or more associated dependency frames are to be decoded.

Abstract: Systems and methods for bi-directional temporal error concealment are described. In one aspect, a lost frame is detected during encoded video decoding operations. Bi-directional estimations for each pixel of the lost frame are calculated to generate a current frame for bi-directional temporal error concealment of the lost frame.

Abstract: The present invention provides a system and methods for producing multiple encoded representations of a video input sequence. The multiple representations produced each contain identified synchronization frames that allow a server and a client to switch between streamed representations in real time without interruption. Synchronization frames are frames of encoded video that can be independently decoded. A representation can thus be decoded starting at a synchronization frame. Each synchronization frame in one representation has a corresponding synchronization frame at a substantially similar temporal location in any other generated representation of the same video input sequence. The temporal co-location of synchronization frames in all representations facilitates the dynamic switching between representations during the streaming process.

Abstract: An apparatus, method, and carrier medium carrying computer-readable code to implement a method that includes generating a difference picture of an accepted picture of a time sequence of pictures minus an estimate of the previous picture in the sequence. The generating of the difference picture includes forming quantized coefficients and passing the quantized coefficients via a prediction loop to generate the estimate of the previous picture. A spatial filter is applied to at least a component of the difference picture such that the forming of quantized coefficients is from a spatially filtered difference picture. The spatial filter is a noise reducing spatial filter configured such that there is a fixed delay between the filter input picture and the filter output picture. The fixed delay is significantly less than the time between consecutive pictures in the time sequence.

Abstract: In one embodiment, a method includes receiving, from a decoder connected to a wireless receiver for communication with a remote apparatus, first error data that indicates a current error rate that corresponds to a first inbound data packet received from the remote apparatus. Based in part on the first error data, it is determined whether the remote apparatus should increase a current signal to noise ratio. If so, then a first outbound data packet is sent to an encoder connected to a wireless transmitter. The first outbound data packet includes first link conditioning request data that indicates a current signal to noise ratio for one or more data packets received from the remote apparatus based at least in part on the first error data. The remote apparatus increases signal to noise ratio of transmissions in response to receiving the outbound data packet.

Abstract: A device and a method for clipping multicarrier signal are provided. The method for clipping multicarrier signal includes: detecting whether an Idle Period in DownLink (IPDL) starts in each subcarrier forming a multicarrier joint signal and generating an IPDL flag just when the IPDL starts in a subcarrier; detecting power of each subcarrier to get a detection result; selecting a clipping filter coefficient according to the IPDL flag and the detection result; performing a clipping processing of the received multicarrier joint signal according to the clipping filter coefficient and outputting the multicarrier joint signal after the clipping processing. Embodiments of the present invention meet demands of an IPDL time template and effectively support an IPDL mechanism in a Wideband Code Division Multiple Access (WCDMA) system on the premise of no multicarrier signal clipping performance is affected.

Abstract: A wireless communication apparatus utilizing an orthogonal frequency division multiplexing communication method includes an antenna transmitting and receives a radio-frequency signal; a receiver frequency converter frequency-converting the radio-frequency signal into a baseband signal in accordance with a low-intermediate frequency method; an analog-to-digital converter converting the baseband signal into a digital signal; an orthogonal frequency division multiplexing demodulator acquiring a plurality of subcarriers in a frequency domain; a data reproduction unit reproducing data; a transmission data generator generating transmission data; an orthogonal frequency division multiplexing modulator performing orthogonal frequency division multiplexing modulation of the plurality of subcarriers; a digital-to-analog converter converting the digital orthogonal frequency division multiplexing signal into an analog signal; and a transmitter frequency converter converting the analog transmission baseband signal into a

Abstract: The present invention relates to a pilot allocation method for an orthogonal frequency division multiplexing system, and the said method is used for a communication system which at least includes one transmitter and two transmitting antennas, characterized in including the following steps: step 1, a user data carrier allocating module in the transmitter allocating a data carrier for a user data symbol, then mapping the user data to the allocated carrier, and finally, outputting the mapped user data to a inverse fourier transform module in the transmitter; step 2, at the same time with step 1, the pilot data carrier allocating module in the transmitter determining the allocation rule of the pilot data according to the subchannel allocation manner and the number of the transmitting antenna of the system, and allocating the pilot carriers for the pilot data, then mapping the pilot data to the allocated carriers, and finally, outputting the pilot data to the inverse fourier transform module.

Abstract: A multiple-input-multiple output (MIMO) transmitter for transmitting a group of sequential orthogonal frequency division multiplexed (OFDM) symbols on a time-division duplexed (TDD) channel in accordance with an IEEE 802.16 standard using a plurality of antennas. The MIMO transmitter comprises a spatial-frequency parser to parse a block of bits into spatial-frequency blocks of a variable number of coded bits, and subcarrier modulators to individually modulate OFDM subcarriers with the spatial-frequency blocks in accordance with spatial-frequency subcarrier modulation assignments to generate groups of symbol-modulated subcarriers. The TDD channel comprises a plurality of the groups of the OFDM subcarriers, and the OFDM subcarriers within each group of subcarriers and within each group of sequential OFDM symbols have the same spatial-frequency subcarrier modulation assignments.

Abstract: A DTV receiver includes a tuner tuning to a channel to receive a broadcast signal, and a demodulator demodulating the broadcast signal. The receiver further includes a first decoder which decodes main and enhanced data included in the demodulated signal by calculating soft decision values for the enhanced data and hard decision values for the main data. The receiver further includes a second decoder for decoding the main and enhanced data for first forward error correction, and a third decoder for decoding the FEC-decoded enhanced data for second forward error correction.

Abstract: Embodiments of a multiple-input multiple-output (MIMO) communication system and methods for beamforming using polar-cap codebooks are generally described herein. Other embodiments may be described and claimed. In some embodiments, beamforming is based on codewords of a polar-cap codebook which represents deviations in the channel with respect to codewords of a full-manifold codebook.

Abstract: A method for performing a precoding based on a generalized phase shift or a precoding based on an extended phase shift in a Multi-Input Multi-Output (MIMO) system employing several sub-carriers, and a transceiver for supporting the same are disclosed. A phase-shift-based precoding matrix is generalized by multiplying a diagonal matrix for a phase shift by a unitary matrix for maintaining orthogonality between sub-carriers. In this case, a diagonal matrix part may be extended by multiplying a precoding matrix for removing interference between sub-carriers by a diagonal matrix for a phase shift. By generalization and extension of the phase-shift-based precoding, a transceiver is more simplified, and communication efficiency increases.

Abstract: A signaling approach using block repetition and phase ramping that is robust and enables multi-user communication with higher order modulations over multipath channels, coupled to a receiving approach in the time domain that utilizes phase de-ramping, block averaging and equalization.

Abstract: Method of correcting a gain and phase imbalance of an analogue modulator (32) for multiple channels (CHi) of a multi-carrier transmission signal, the method comprising the steps of determining a gain imbalance correction factor (GCFi) and phase imbalance correction factor (PCFi) for each channel individually and applying said correction factors (GCFi, PCFi) to the corresponding channel (CHi) individually, before the multi-carrier synthesis of the channels is done, whereas step a) for each one of the multiple channels (CHi) is performed in a time-multiplexed manner with step a) for the other ones of the multiple channels (CHi).

Abstract: A method for determining transmit power spectral density (PSD), includes: calculating time sharing parameters corresponding to transmission patterns for all users in each frequency band; and determining transmit PSD according to the transmission patterns and the time sharing parameters. A device for determining a transmit PSD including a calculation module and a PSD determining module is disclosed as well. Using the solution, the time for determining the transmit PSD can be saved.

Abstract: Disclosed is an SSC controller that exercises control to supply a control signal to a phase interpolator which receives an input clock signal and varies the phase of an output clock signal in accordance with the control signal, and to frequency-modulate the output clock signal. In an SSC controller, a counting operation control circuit outputs a counting operation control signal that controls count enable and disable. A p-counter receives a frequency-divided clock signal from a frequency divider and counts the signal when the counting operation control signal from the counting operation control circuit indicates count enable. Upon counting up to a predetermined first value, the counting operation control circuit generates a first output signal and sets its count value to zero. When the counting operation control signal indicates count disable, the p-counter stops counting.

Abstract: A system and method are described in which space-time coding techniques are used to transmit and receive multiple data streams within a near vertical incidence skywave (“NVIS”) communication system. Within the NVIS communication system, multiple independent data streams may be transmitted from a transmitting station at a high radiation angle, approaching or reaching 90 degrees. The data streams are reflected off of the ionosphere of the earth and received by one or more receiving stations. In one embodiment, the space-time coding techniques are multiple-input multiple-output (“MIMO”) signal communication techniques.

Abstract: The present invention is a system and a method of filtering a signal at a receiver, the signal having at least a desired channel and blockers. A first converter converts a first copy of the signal resulting in a relatively narrow band, high-resolution first signal. A second converter converts a second copy of the signal resulting in a relatively wide band, low-resolution second signal. Once each copy of the signal is converted, the copies are passed to a combiner. At the combiner, the two copies of the signal are analyzed and the desired channel is extracted from the first copy of the signal by removing any inter-modulation product caused by any interference detected in the second copy from the blockers (not detected in the first copy).

Abstract: A receiver includes a receiving section configured to receive digital broadcasts; a demodulating section configured to demodulate a signal received by the receiving section and output a frame-based signal including a plurality of symbols; a detecting section configured to detect a symbol position in a frame-based signal provided from the demodulating section; a decoding section configured to decode a frame-based signal from the demodulating section in accordance with a symbol position; a symbol counter configured to output a count output specifying a symbol position in a signal decoded in the decoding section; and a control section configured to control counting of the symbol counter on the basis of a symbol position detected by the detecting section and on a count value of the symbol counter.

Abstract: An apparatus for signal detection to enhance performance of a receiver and method therefor. The signal detection unit provides at least three filtered output signals with different bandwidths, wherein at least one of output signals is generated by phase derotation and filtering. The three filtered digital signals are provided for a subsequent stage, such as a digital signal processor, to perform further operations of a receiver in different modes, such as a synchronization mode where the receiver synchronizes with a base station or a normal mode where transmitted data contained in the received signal is extracted. The signal detection unit includes a memory buffer with a reduced memory size for preparation of the three filtered digital signals efficiently. The circuit complexity and size can be dramatically improved and the performance of the receiver can be enhanced by the signal detection unit.

Abstract: A digital broadcast system including a broadcast receiving system and data processing method are disclosed. In the broadcast receiving system receiving broadcast signals, the broadcast receiving system includes a transmission parameter decoding unit, a known sequence detector, and a burst controller. The transmission parameter decoding unit detects information on a burst of a received signal from broadcast data having main service data and mobile service data multiplexed therein within a field of the received signal and outputs the detected information on the burst. The known sequence detector receives burst information from the transmission parameter decoding unit and uses the received burst information and known data position information included in the received data, so as to output burst control information. The burst controller uses the burst control information to control power supply of the broadcast receiving system.

Abstract: A method, algorithm, circuits, and/or systems for amplitude shift keying (ASK) modulation are disclosed. In one embodiment, a sampling demodulator includes a comparator configured to compare an ASK modulated input to a predetermined voltage level and provide a comparison result, a pulse stretcher with a sampler configured to sample the comparison result a plurality of times for each of a plurality of cycles of the ASK modulated input to generate a bit stream and digital logic configured to determine a value for each data bit in the ASK modulated input from the bit stream, and a digital filter configured to filter an output of the digital logic, thereby providing a demodulated signal.

Abstract: A wireless communication apparatus receives an quadrature modulated signal, generate a local signal having a frequency different from a center frequency of the quadrature modulated signal, performs quadrature demodulation on the quadrature modulated signal by using the local signal, to obtain an I channel signal and a Q channel signal, performs Fourier transform on the I channel signal and the Q channel signal, to obtain signals in a frequency domain, and calculates a first correction coefficient for correcting phase distortion and amplitude distortion caused by the quadrature demodulation by using pairs of signals among the signals, each of the pairs are located at symmetrical frequency positions with respect to the frequency of the local signal.

Abstract: An embodiment of the present invention provides a system for detecting a phase-shifted signal at high frequencies in data and clock recovery circuitry. An up-pulse generator, in one embodiment, provides output pulses having a duration exceeding the duration of input pulses upon detection of a phase-shifted signal leading the reference signal. A down-pulse generator provides output pulses having a duration exceeding the duration of input pulses upon detection of a phase-shifted signal lagging the reference signal.

Abstract: A data transmission system includes a transmitter and a receiver. The transmitter mixes an original clock signal and an original data signal to generate and output a hybrid differential signal, the hybrid differential signal having multiple clock pulses and multiple data pulses. At lease one data pulse occurs between two clock pulses, and the period between two clock pulses corresponds to the frequency of the original clock signal. The clock pulses and the data pulses have different differential swings. The receiver receives the hybrid differential signal via a bus and generates a recovered clock signal and a recovered data signal based on the hybrid differential signal. The hybrid differential signal, the original clock signal and the original data signal are reduced swing differential signals.

Abstract: A correlation device and method for different modulated signals such as BPSK signal and BOC signal. According to the present invention, the correlation device has one or more sections. Each section comprises a correlation unit for executing correlation; a first signal path for passing a received signal directly to the correlation unit; a second signal path for transferring a BOC signal into a BPSK-like signal and passing the signal to the correlation unit. The correlation unit has a multiplexer for selecting to allow an output of one of the first and second signal paths to be subject to signal correlation. The correlation results of the respective sections can be combined.

Abstract: In a wireless communication system having a receiver which receives, through plural reception antennae, signals transmitted from plural transmission antennae, bit likelihood can be surely calculated without requiring a selection processing. A transmitter has M transmission antennae, and transmits signals through the transmission antennae, respectively. A receiver has N reception antennae, and receives signals. K nulling devices perform nulling with use of signals received, and output part of nulling signals. K demodulation devices are inputted with nulling signals, demodulate signals, and output demodulated signals. A parallel-serial conversion device is inputted with demodulated signals, converts the parallel format thereof into a serial format, and outputs the result as demodulated data.

Abstract: A high-speed receiver includes multiple receiver components. Each receiver component includes sampling latches for receiving data, phase rotators for controlling timing of sampling of data by the sampling latches, and a clock-tracking logic stage for providing clock and data recovery. The clock-tracking logic stage is divided into a high-speed early/late (E/L) logic and aggregation counter section and a low-speed logic section, separated by a synchronization logic block. The receiver also includes a delay locked loop (DLL) for receiving an input clock signal corresponding to a data rate of the received data, providing coarse delay adjustment of the clock signal and outputting multiple clock phase vectors corresponding to the adjusted clock signal to the phase rotators on each receiver component. The phase rotators control sampling of the data based on the clock phase vectors received from the DLL. A single regulated power supply regulator regulates power supplied to the DLL and the phase rotators.

Abstract: When recording stream data, index information and time correction information are recorded in correspondence with the stream data. The index information specifies a position of an invalid section in the stream data. The time correction information specifies a time which, supposing that a PCR included in the invalid section was able to be got, a time clock would have shown in synchronization with the PCR. When reproducing the stream data recorded together with the time correction information and the index information, at a position where the invalid section ends, the time clock can be set to a time intended by a broadcasting system, by referencing the index information and the time correction information.

Abstract: An object of the present invention is to provide a DLL circuit adjustment system that can adjust the sampling timing of a DLL circuit without causing any increase of the number of interface signals or amount of coding overhead and any reduction of the data transfer efficiency. On a transmitter side, an ECC generating section adds an error detection/correction code to transmission data and outputs the transmission data with the error detection/correction code. Of output channels of the transmission data from the ECC generating section, a data bit associated with the DLL circuit to be adjusted is replaced with a sampling timing adjustment pattern using a to-be-adjusted channel selection circuit and a selector, and the resulting transmission data is transmitted to a receiver side.

Abstract: Disclosed are embodiments of a phase control circuit with an analog phase controller that is able to effectively generate control signals for all four quadrants of phase control operation.

Abstract: A PLL frequency generator is disclosed for generating an output signal with a settable target frequency, comprising a) a voltage-controlled oscillator for generating the output signal depending on a control voltage, b) a switchable frequency divider, which is connected to the voltage-controlled oscillator and is designed to derive a frequency-divided signal whose instantaneous frequency depends on a value of an adjustable divisor, from the output signal c) a switchable delay unit, which is connected to the frequency divider and is designed to generate a delayed signal in that the frequency-divided signal is delayed by delay times that in each case depend on a control word and a control signal, and d) a phase detector, which is connected to the switchable delay unit and is designed to determine the phase difference between a reference signal and the delayed signal and to provide it for the generation of the control voltage.

Abstract: A method of early sensing of water leakage, through chemical concentration monitoring, in a nuclear reactor system using a liquid metal and molten salt, the method including: measuring an electrical conductivity and a mass spectrum of a first channel and a second channel of a heat-related device included in the nuclear reactor system using the liquid metal and the molten salt; calculating a first identification value associated with the water leakage in the heat-related device using the measured electrical conductivity; calculating a second identification value associated with the water leakage in the heat-related device using the measured mass spectrum; and sensing the water leakage by comparing a predetermined reference value and a summed identification value, the summed identification value being the sum of the first identification value and the second identification value.

Abstract: A method and system for image reconstruction of data acquired by a device such as computed tomography is provided. The method and system use a multi-stage statistical iterative reconstruction techniques to provide a three dimensional representation of the scanned object. In one embodiment, the first stage uses a projection-based reconstruction technique, such as Ordered Subset (OS) to converge on a solution for low frequency portion of the image. A subsequent stage uses a voxel-based reconstruction technique, such as Iterative Coordinate Descent (ICD), to converge on a solution for high frequency portions of the image. Systems and methods for reconstructing images from incomplete or partial projection data is also provided.

Abstract: An energy-sensitive computed tomography system is provided. The energy-sensitive computed tomography system includes an X-ray source configured to emit an X-ray beam resulting from electrons impinging upon a target material. The energy-sensitive computed tomography system also includes an object positioned within the X-ray beam. The energy-sensitive computed tomography system further includes a detector configured to receive a transmitted beam of the X-rays through the object. The energy-sensitive computed tomography system also includes a filter having an alternating pattern disposed between the X-ray source and the detector, the filter configured to facilitate measuring projection data that can be used to generate low-energy and high-energy spectral information.

Abstract: The present invention provides a material decomposition method capable of determining the distribution of density and constituent material concentration throughout an imaged object. The concentration, in the form of a mass fraction, mass percent, weight fraction, or weight percent, is determined from CT images acquired at different energy levels. The ratio of attenuation coefficients associated with one energy level to attenuation coefficients associated with another energy level is determined and used as an index in a lookup table to determine the concentration of a given material throughout the imaged object.

Abstract: An X-ray computed tomography (CT) apparatus having an X-ray tube emitting an X-ray, a detector detecting X-rays transmitted through a subject to be examined, and a bed on which said subject to be examined is placed, said X-ray CT apparatus reconstructing the image of the subject to be examined from a transmission data obtained by emitting X-rays to the subject to be examined. The X-ray computed tomography (CT) apparatus further having an input part, a scan controlling part, a detecting part, a memory part, a segmentation part, a biological-signal synchronization reconstructing part, a biological-signal asynchronization reconstructing part, and a combining part.

Abstract: A technique is provided for imaging a field of view using an X-ray source comprising two or more emission points. The two or more emission points may be independently operated. Independent operation of the two or more emission points in performed in accordance with a list of commands that specifies the operation of the emission points. The list of commands, in one embodiment, is stored in a sequence buffer. In other embodiments, the list of commands is generated for a given usage, without being stored in a sequence buffer.

Abstract: An X-ray CT apparatus comprises a rotating part, a fixed frame and a stand. The rotating part mounts an X-ray tube and a detector. The fixed frame supports the rotating part. The stand settled to a floor supports the fixed frame. The stand includes a lower member, supporters and a fixing member. The lower member is settled to the floor. Each of the supporters settled to the lower member supports each side of the fixed frame. The fixing member fixes a lower part of the fixed frame with the lower member.

Abstract: An X-ray computed tomographic apparatus includes an X-ray tube, an X-ray detector, a rotating mechanism unit which continuously rotates the X-ray tube around a subject to be examined, together with the X-ray detector, a data storage unit which stores projection data corresponding to an output from the X-ray detector in association with the angles of the X-ray tube at the time of data acquisition, a reconstruction processing unit which reconstructs a plurality of images on the basis of a plurality of projection data sets stored in the data storage unit, the plurality of projection data sets corresponding to the same range from a first view angle to a second view angle, and a display unit which displays the plurality of reconstructed images.

Abstract: An imaging method and apparatus is described in which distances between a source and an object are changed and projection images are generated at each of the different distances.