Abstract: Method for the monitoring of an environment, by procuring, adjourning and storing in a memory, files representing the background space. Programs for processing data obtained from the observation of objects are defined and stored in a memory, for identifying the objects and for determining whether they are dangerous. Parameters, according to which the observation of the controlled space is effected, are determined and stored. Photographic observation of the controlled space or sections thereof, is performed according to the aforesaid observation parameters. The digital data representing these photographs are processed to determine whether possible dangerous objects have been detected, and if so, these objects are classified according to the stored danger parameters.

Abstract: A signal reproduction device and signal reproduction method capable of automatically discriminating the format of input data and reproducing the data is provided.

Abstract: A variable length coding method is comprised of: a coefficient value scanning step in which an RL sequence generation unit 203, a reordering unit 202, and a binarization unit 203 scan coefficient values within a block in a predetermined scanning order starting at a higher-frequency component toward a lower-frequency component; and an arithmetic coding step in which an arithmetic coding unit 205 and a table storage unit 204 perform arithmetic coding on the absolute values of the coefficient values according to the scanning order used in the coefficient value scanning step, by switching between probability tables 1˜4 for use, wherein, in the arithmetic coding step, a probability table to be used is switched to another probability table in one direction, when the arithmetic-coded absolute values of the coefficient values include an absolute value exceeding a predetermined threshold value.

Abstract: A method places a component at a desired position on a substrate by means of a placement device. The component is transported to an intermediate position above the desired position and a position difference between the intermediate position and the desired position is determined by means of a camera and a processor. Subsequently, the component is transported to the desired position on the substrate, making use of the position difference. The camera, which is arranged at the side of the component opposite the component's side facing the substrate, takes an image of at least the portion of the substrate that includes the desired position as well as the placement device.

Abstract: A method of synchronizing the phase of a local image synchronization signal generator of a local video data processor in communication with an asynchronous switched packet network to the phase of a reference image synchronization signal generator of a reference video data processor also coupled to the network, the local and reference processors having respective clocks, the reference and local image synchronization signal generators generating periodic image synchronization signals in synchronism with the reference and local clocks respectively comprises the steps of: frequency synchronizing the local and reference clocks; the reference video data processor sending, via the network, to the local data processor an image timing packet providing reference image synchronization data indicating the difference in timing, measured with respect to the reference processor's clock, between the time at which the image timing packet is launched onto the network and the time of production of a reference image synchroni

Abstract: The medical, particularly dental imaging camera including an elongated housing (2) that can be held by a single hand of a user and provided, at its front end, with an imaging element, this housing (2) including a sensitive control element capable of freezing, on a display (5), an image selected by the user, this control element having a detection area (9) situated on the housing (2) that is delimited by a surface discontinuity such as a recess or a relief (11). The housing (2) encloses a sensor element associated with an electronic driving circuit and an electrostatic foam element whose one end is applied against the sensor element and whose opposite end is applied against an area of the inner face of the housing (2) located to the right of the detection area (9).

Abstract: The present invention records a main stream containing video contents and an auxiliary stream related therewith as logically-separated clip files on a recording medium. The logically-separated clip files, however, are interleaved on a physical recording area. Because the interleaved units of the auxiliary stream can be individually identified by a file system of the recording medium, the auxiliary stream recorded on the recording medium can be replaced with another one during reproduction or presentation.

Abstract: Disclosed herein are systems and methods for evaluating video quality. The systems include a video transmitter and a video receiver. The transmitter generates feature parameters from a reference video to be transmitted and transmits the generated feature parameters along with compressed video data via a network. The video receiver receives the feature parameters and the compressed video data via the network, evaluates the video quality of the received video using the feature parameters and transmits video quality evaluation results to the video transmitter via the network.

Abstract: Embodiments of this invention include computer-implemented mathematical methods to develop software and/or hardware implementations that use wavelet transforms (WT) to pre-process video frames that can then be compressed using a variety of codecs to produce compressed video frames. Such compressed video frames can then be transmitted, decompressed, post-processed using the post-processing methods disclosed in the invention and displayed in their original size and quality using software and/or hardware implementations of embodiments of the invention, thereby producing real-time high-quality reproduction of video sequences. Embodiments include computer devices and computer readable media to implement these methods.

Abstract: A variable length coding method is comprised of: a coefficient value scanning step in which an RL sequence generation unit 203, a reordering unit 202, and a binarization unit 203 scan coefficient values within a block in a predetermined scanning order starting at a higher-frequency component toward a lower-frequency component; and an arithmetic coding step in which an arithmetic coding unit 205 and a table storage unit 204 perform arithmetic coding on the absolute values of the coefficient values according to the scanning order used in the coefficient value scanning step, by switching between probability tables 1˜4 for use, wherein, in the arithmetic coding step, a probability table to be used is switched to another probability table in one direction, when the arithmetic-coded absolute values of the coefficient values include an absolute value exceeding a predetermined threshold value.

Abstract: A method of finding the prediction direction during intraframe video image coding.

Abstract: Highly efficient lossless decoding is realized under the condition that codes transmitted as a base part are compatible with the H.264 standard. An orthogonal transformation section (12) performs orthogonal transformation of residual signals (Rorig), acquires transform coefficients (Xorig), and a quantization section (13) quantizes the transform coefficients. An existential space determination section (14) obtains information on upper limits and lower limits of the respective coefficients (an existential space of transform coefficients) from quantization information.

Abstract: A variable length coding method is comprised of: a coefficient value scanning step in which an RL sequence generation unit 203, a reordering unit 202, and a binarization unit 203 scan coefficient values within a block in a predetermined scanning order starting at a higher-frequency component toward a lower-frequency component; and an arithmetic coding step in which an arithmetic coding unit 205 and a table storage unit 204 perform arithmetic coding on the absolute values of the coefficient values according to the scanning order used in the coefficient value scanning step, by switching between probability tables 1˜4 for use, wherein, in the arithmetic coding step, a probability table to be used is switched to another probability table in one direction, when the arithmetic-coded absolute values of the coefficient values include an absolute value exceeding a predetermined threshold value.

Abstract: The video encoder in accordance with the present invention divides input image signal into macro blocks, estimates motion vectors of each macro block and finally encodes the input image signal. The encoder determines the number of macro blocks adjacent to a current macro block. If the number of adjacent macro blocks is equal to or more than two, the encoder calculates a motion vector of the adjacent macro blocks and selects a macro block that has the largest motion vector. Then it defines a least search area that the current adaptive motion vector can have, and compares the least search area with the motion vector of the largest adjacent macro block, and finally determines the largest value as the search area of the adaptive motion vector. Next, the encoder compares the search area of the adaptive motion vector with the search area of the user-defined motion adaptive vector to thereby determine the least value as the search area of the final adaptive motion vector.

Abstract: A first block size motion searching device (4) detects a motion vector with respect to each of blocks by a unit of variable blocks in the smallest first block size. A feature value extracting device (6) detects a feature value between the adjacent blocks. A motion search determining device (7) determines by utilizing the feature value whether or not the motion search should be executed in the second to nth block sizes. A search center generating device (8), a search area generating device (9) and a selected block size motion searching device (10) selects the second to nth block sizes and detects the motion vector. A block size determining device (11) determines the block size having a high efficiency.

Abstract: A system and method for detecting and reducing mosquito noise are disclosed. Areas within a frame with mosquito noise are detected by calculating the variance of the luminance blocks in a macroblock, determining the minimum variance of the macroblock luminance blocks, and comparing the minimum variance to a mosquito noise threshold. If the minimum variance is greater than the mosquito noise threshold, then the macroblock is considered a high activity macroblock and the corresponding macroblock bit in the frame bitmap is set. If the minimum variance is less than or equal to the mosquito noise threshold, then the macroblock is considered a low activity macroblock, and the corresponding macroblock bit in the frame bit map is cleared. If the current macroblock bit is set in the corresponding frame bitmap or if at least one of its adjacent eight macroblock bits is set in the corresponding frame bitmap, then the current macroblock requires mosquito noise reduction.

Abstract: A system and method are provided for time scaling playback of digital audio signals with associated digital video signals. Initially, the digital video signals and the digital audio signals are received. Next, the digital audio signals are processed for the time scaling thereof while substantially preserving the frequency pitch of the digital audio signals. The processed audio signals are then encoded. Such encoded audio signals are then outputted for accelerated playback with the associated digital video signals.

Abstract: When a block (MB22) of which motion vector is referred to in the direct mode contains a plurality of motion vectors, 2 motion vectors MV23 and MV24, which are used for inter picture prediction of a current picture (P23) to be coded, are determined by scaling a value obtained from averaging the plurality of motion vectors or selecting one of the plurality of the motion vectors.

Abstract: In the invention, a rate distortion optimization (RDO) based rate control scheme is comprised of following two steps: first, does bit allocation for every frame in a GOP, and based on the allocated bits, a predicted quantization parameter is used to do the first rate distortion optimization mode selection for every macroblock in the current frame; second, the information of the current macroblock collected from the first rate distortion mode selection is used to calculate a final quantization parameter for rate control, and if the final quantization parameter is different from the predicted one, a second rate distortion mode selection will be executed again. A rate distortion optimization based rate control implementation includes following modules: a video coding encoder module (for example, H.264/JVT processing module), rate distortion optimization based macroblock mode selection and adaptive quantization module, virtual buffer, and global complexity estimation module.

Abstract: A rate of change of visual content (compared to an adjacent video frame) of a video frame is determined, and the video frame is selected as a key video frame if the rate exceeds a threshold value. In an embodiment, to compute the rate, the motion energy vector magnitude (square of displacement magnitude) of each moved pixel of the current frame is determined, and an average displacement magnitude is determined. The average displacement magnitude may also be used to determine the rate.