Abstract: Disclosed is a wideband audio signal coding/decoding device and method that may code a wideband audio signal while maintaining a low bit rate. The wideband audio signal coding device includes an enhancement layer that extracts a first spectrum parameter from an inputted wideband signal having a first bandwidth, quantizes the extracted first spectrum parameter, and converts the extracted first spectrum parameter into a second spectrum parameter; and a coding unit that extracts a narrowband signal from the inputted wideband signal and codes the narrowband signal based on the second spectrum parameter provided from the enhancement layer, wherein the narrowband signal has a second bandwidth smaller than the first bandwidth. The wideband audio signal coding/decoding device and method may code a wideband audio signal while maintaining a low bit rate.

Abstract: Provided are a channel management method and a channel selection method for a wireless node in a wireless ad-hoc network. The channel management method includes the steps of: (a) when a current mode is a first mode, performing channel selection using a method for evenly distributing a channel within an interference range; and (b) when the current mode is a second mode, performing channel selection based on a channel switching probability. According to the method, by preventing a channel change from being continuously repeated in a wireless ad-hoc network using multi-channel multi-interface, it is possible to prevent data transmission delay and network performance deterioration.

Abstract: A congestion-resilient link adaptation method is provided. The link adaptation method for selecting any one of modes having mapped transmission parameters includes the steps of: estimating a channel-induced error number indicating the number of channel-induced transmission failures in a current mode and comparing the estimated channel-induced error number with a mode-down threshold; and determining whether the mode-down is performed based on the comparison result. Thus, higher throughput can be achieved without use of additional hardware or protocols.

Abstract: Exemplary embodiments relate to a chuck assembly. The chuck assembly may include a chuck having a first channel having a fluid circulating therein, and a temperature control system adapted to maintain a temperature of the fluid within a first temperature range and vary the maintained temperature range of the fluid to a second temperature range from the first temperature range.

Abstract: Provided are a system and method for allocating an Internet protocol version 4 (IPv4) address through authentication of a dual stack transition mechanism (DSTM) node in a DSTM communication network, DSTM being an IPv4/IPv6 address translation mechanism. The system and method perform authentication when an IPv4 address is allocated between a DSTM node and the DSTM server in the DSTM communication network. According to the system and method, when the DSTM node requests IPv4 address allocation, the DSTM server authenticates the DSTM node, and then allocates an IPv4 address. Therefore, it is possible to solve a problem of exhaustion of an IPv4 address pool of the DSTM server by a denial of service (DoS) attack, as well as potentially solve a security problem of an IPv4/IPv6 translation process.

Abstract: A method of calculating a bandwidth for a mobile terminal including requesting, by the mobile terminal, a description of a streaming content from a network and receiving a response from the network, requesting, by the mobile terminal, a Quality of Service (QoS) value corresponding to a required amount of bandwidth resources of the network for receiving a streaming service of the contents from information about the content included in the received response, and receiving, by the mobile terminal, allocated bandwidth resources of the network according to the QoS value.

Abstract: A method for providing end-to-end security service in a communication network having an NAT-PT function comprises: performing security negotiation between a first node included in a first communication network having the network address translation-protocol translation function and a second node included in a second communication network operating with a protocol different from the first communication network; storing protocol translation information generated when the security negotiation is performed in the first node; and performing security transmission between the first and second nodes using the stored protocol translation information. The method transmits the address translation information to the ends in advance, thereby being capable of applying the security service using the address information on transmitting the data between hosts in the communication network using the address translation method.

Abstract: A picture ratio controlling apparatus and method by which a user controls a picture ratio of a video signal provided to a video display device so as to easily control the picture ratio of the video signal displayed on the video display device. The picture ratio controlling apparatus includes a video display device displaying a video, and a system controller determining at least one selectable picture ratio mode based on information of the picture ratio of a source video to be provided to the video display device and the information of the picture ratio that can be supported by the video display device, and controls the picture ratio of the source video provided to the video display device, when a user requests a picture ratio selection. Accordingly, the user can control the picture ratio of a video displayed on the video display device by simply manipulating a key.

Abstract: An apparatus and method for detecting a rate of rotation of a DC spindle motor without using an additional frequency generation (FG) signal generator in electronic equipment using the DC spindle motor. The apparatus detects the rate of rotation of a DC motor based on a current applied to the DC motor without using an additional FG signal generator in electronic equipment employing the DC motor and performs control corresponding to a detected result, thereby lowering costs and improving a manufacturing process in comparison with a conventional method employing a brushless motor to detect the rate of rotation of a motor.

Abstract: An optical disk reproducing apparatus having playback systems of CD and DVD containing their respective sync signals and method thereof. The playback systems respectively have sync detectors, and a controller analyzes a sync signal output from the sync detectors when a disk is detected to be mounted. The CD playback system is selectively driven when a CD sync signal is detected to perform a CD playback mode, and the DVD playback system is selectively driven when a DVD sync signal is detected to perform a DVD playback mode.

Abstract: A printed circuit board having multiple layers, includes: a copper film for removing signal interference and noise and matching impedance, formed between pads of a lowermost layer which are connected to of an uppermost layer.

Abstract: An optical disk reproducing apparatus having playback systems of CD and DVD containing their respective sync signals and method thereof. The playback systems respectively have sync detectors, and a controller analyzes a sync signal output from the sync detectors when a disk is detected to be mounted. The CD playback system is selectively driven when a CD sync signal is detected to perform a CD playback mode, and the DVD playback system is selectively driven when a DVD sync signal is detected to perform a DVD playback mode.

Abstract: An apparatus for controlling a rotational servo by using a frequency pulse signal generator is provided. The rotational servo controlling apparatus has a frequency pulse signal generator for generating a frequency pulse signal indicating the current rotational speed of the motor. A track count signal generator counts the number of tracks from the current track to an object track, and generates a corresponding track count signal. A microprocessor receives the frequency pulse and the track count signals and issues a command to generate a reference frequency pulse signal. A reference pulse signal generator receives the command and generates the reference frequency pulse signal. A phase comparator compares the frequency pulse signal and the reference frequency pulse signal and issues a comparison signal. The rotational servo controls the rotational speed of the spindle motor to rotate at a speed proper for the reading of data from the object track, i.e.

Abstract: A program search method for a digital signal processor which can search a program irrespective of the presence or absence of chapter numbers indicating portions of a recorded program includes the steps for setting predetermined search interval and reproduction period according to respective external inputs, jumping from a present location by the predetermined search interval set in the setting step, reproducing the program from a recording medium for the predetermined reproduction period set during the setting step after performing the jumping step, and then repeatedly performing the jumping and reproducing steps. In contrast with the conventional method, the program search method performs search and intro functions by the set intervals, which are defined in terms of time or frame units. Thus, the multi-intro scan function can be performed even if there is no chapter number differentiation for each respective program.

Abstract: A spindle motor controlling apparatus having a motor driving device, a motor speed controlling device, a MICOM and an image processing device uses a horizontal synchronization comparing device which detects a horizontal synchronization signal of the image processing device and compares the detected synchronization signal with a reference synchronization signal and applies the compared signal to the MICOM. The motor driving device further includes a switching part for providing power according to the control signal of the MICOM to the spindle motor.