Abstract:
Multiplexing of information from a plurality of information flows into fixed-length packets such as, but not limited to, MPEG packets allows efficient utilization of bandwidth and also can be used to reduce transmission latency. In addition, utilizing MPEG packets and transport streams for octet multiplexing allows the packets carrying octet-multiplexed data to easily be integrated with other MPEG packets for other services that are commonly found in cable transmission networks of all coax, hybrid fiber coax, and/or all fiber. Moreover, the multiplexing techniques described herein will work in both wired (or constrained media) and wireless (or free-space propagation) environments. The multiplexing/demultiplexing of octets using MPEG packets generally is described by mappings that specify the use of octets in MPEG packets. Changes to allocations in a map generally should be propagated in a way that reliably ensures that both the transmitter and receiver have a consistent view of the octet mappings.
Abstract:
A storage unit capable of retaining data during sleep mode. The storage unit includes a first latch composed of first and second inverters and a second latch composed of the first inverter and a third inverter, in which the first and second inverters have different threshold voltages. The first inverter comprises an input terminal coupled to a write port and an output coupled to a read port. The second inverter comprises an input terminal coupled to the read port and an output terminal coupled to the write port. The third inverter comprises an input terminal coupled to the write port and an output terminal coupled to the read port.
Abstract:
A printed circuit board structure for heat dissipation of an integrated circuit includes a printed circuit board having an opening, and a thermal conductive material disposed within the opening, wherein the integrated circuit is disposed over the opening and the thermal conductive material is thermally connected to the integrated circuit. The opening can be designed to have a specific shape to allow the opening to be completely filled by the thermal conductive material during a fillet process, therefore obtaining better heat dissipation performance and protecting the integrated circuit from over heating.
Abstract:
Disclosed is a method for controlling the shapes of FM-AM mixed halftone dots on the multi-bit depth imaging apparatus. In the prior art, since the reproduction of the shapes of the dots in various gradations is absolutely based on the theory of random error diffusion and is influenced by the dynamic controlling output mechanism for the multi-bit dots, it is hard to assure the controllability of the shapes of the dots in a certain gradation. Based on the prior art, the dynamic statistic algorithm with adjacent output gray levels is introduced to assure the controllability of the shapes of the dots and solve the problem of random change of the shapes of the dots due to the randomicity of the error diffusion. According to the disclosed method, the features of the multi-bit imaging apparatus can be achieved fully in light of the requirements of the dots on the basis of the original method for multi-bit FM-AM mixed screening using error diffusion based on dual-feedback. The effect of FM-AM mixed halftone screening can be achieved under low resolution with controllable shapes of the dots, The problem of granular sensation can be solved during the practical output of the mixed halftone dots so as to assure the smooth effect of the gradations.
Abstract:
Manufacturing process of a composite bamboo board, comprising assembling and hot-pressing adhesive-coated bamboo fiber bundles, wherein the said adhesive is a composition comprising of adhesive base material, coupling agent and impregnating wetting agent, the said adhesive base material is one or more selected from a group consisting of urea-formaldehyde resin, melamine, phenolic resin, and water based isocyanate; the said coupling agent is agent which can couple the interfaces of bamboo fiber bundles and the adhesive base material; the impregnating wetting agent is one or more surfactant; and the said hot-pressing includes heating by using high-frequency electromagnetic field with frequency being of 1 KHz or higher and compressing the adhesive-coated bamboo fiber bundles.
Abstract:
A computer enclosure includes a rear wall (10) and an I/O plate (20). The rear wall defines an opening (12) therein. The opening has two opposite edges. A positioning tab (16) is formed on one of the opposite edges of the opening. The I/O plate is shaped for covering the opening of the rear wall. The I/O plate has two opposite edges and defines a cutout (242) at one of the two opposite edges thereof configured for the positioning tab inserting therethrough. A positioning tab (248) is formed on and cooperates with the other one of the opposite edges of the I/O plate for slidably sandwiching the other one of the opposite edges of the opening therebetween. A protrusion (246) is formed on the I/O plate configured for engaging into the opening of the rear wall to prevent the I/O plate sliding to align the cutout thereof with the positioning tab of the rear wall.
Abstract:
Data symbols in the training sequence are rotated at the transmitter end through a phase rotation factor which is specific for a given modulation type that is used. For blind modulation detection at the receiver end, the data symbols are derotated through different phase rotation factors, and a correlation function is formed between the sequences obtained in this way and the original training sequence. The type of modulation which is used is obtained from the phase rotation factor which produces a maximum for the correlation function.
Abstract:
A multiple frequency band planar antenna formed on one-side surface of a circuit board comprises: a first antenna pattern, a second antenna pattern, a third antenna pattern and a fourth antenna pattern, each antenna pattern further comprising an elongated portion and a conductor portion; wherein the second elongated portion at a point between its two ends is short-circuited to a feeding transmission line formed on another-side surface of the circuit board through a via. Thus, the multiple frequency band planar antenna can operate at three frequency bands with their central frequencies at 2.4 GHz, 3.5 GHz and 5.8 GHz, respectively, suitable for both WIFi LAN and WiMAX MAN applications.
Abstract:
A method and a circuit for the digital correction of a frequency of a signal, especially for use in a transmitter/receiver circuit include rotating a signal “pointer” (i0, q0) using a CORDIC algorithm, through a predetermined angle in a complex I/Q plane corresponding to a correction frequency. The CORDIC algorithm includes micro-rotation blocks corresponding to N stages, and a character table and a register.