33 results about "Delay encoding" patented technology

A method and apparatus for staggercasting, encodes a first signal representing content and encodes a second signal representing the content using encoding relatively more robust than the encoding of the first encoded content representative signal. A composite signal including at least the first and second encoded signals is generated, in which one of the first and second encoded signals is delayed with respect to the other encoded signal. If an error is detected in the composite signal, then the undelayed encoded signal is decoded to reproduce the content. Otherwise, the delayed encoded signal is decoded to reproduce the content.

An apparatus for transmitting signals with multiple antennas is disclosed. The multiple antenna transmission apparatus performs space-time encoding or space-frequency encoding, and cyclically delays the encoded symbol with a plurality of delay-values to generate a plurality of delayed symbols. The multiple antenna transmission apparatus transmits the plurality of delayed symbols to the channel through a plurality of antennas. By changing the number of space areas for encoding and the number of delay-values for delaying, the number of antennas for the multiple antenna transmission apparatus is easily expanded.

Communicating data is disclosed. A time delay encoding a data to be communicated is selected. A sonic signal is combined with a version of the sonic signal that is delayed by the selected time delay. The data is communicated at least in part by transmitting the combined signal to a mobile device.

Encoded symbols of a concatenated convolutional-encoded and block encoded signal are presented to a conventional first stage of a concatenated decoder, comprising in sequence a soft metric generator, a Viterbi decoder, a first de-interleaver and a first block decoder such as a Reed-Solomon decoder. The encoded symbols are also presented to a delay chain to produce progressively delayed encoded symbols. Where an output block of the conventional decoder is indicated as being a valid codeword by the first block decoder, the bytes in this block are marked as being correct. These bytes that are known to be correct are then used after interleaving and serialization as known bits input to a second stage of the decoder process operating on the delayed encoded symbols and incorporating a modified soft metric generator constrained by the known bits. This process can be extended to further iterations as required. A modified Viterbi decoder, which is also constrained by the known bits, may also be used in the second and subsequent iterative stages.

The invention belongs to the technical field of video coding, in particular to a rate-distortion optimization method based on time-domain dependence in low-delay video coding. The present invention adopts a cyclic group of picture (GOP) structure, and every 4 frames is a GOP, and the frames in the GOP are allocated to different layers, and the frames of the same layer follow similar reference frames and QP allocation rules . Analyze the time-domain dependence of the hierarchical structure in low-delay coding, and establish a time-domain propagation chain according to the time-domain dependence in low-delay coding, as shown in Figure 2, and then perform time-domain dependent rate-distortion optimization modeling. Calculate the propagation factor ωa and the global Lagrangian multiplier λg. Finally, according to the propagation factor ωa, the present invention realizes time-domain rate-distortion optimization only by adjusting the global Lagrangian multiplier λg.

The present invention relates to a propagation matrix modulus optimization fitting method and system based on differential evolution algorithm, comprising: determining target fitting accuracy tol and fitting frequency range; determining the range of pole numbers; determining the range of delay τ; The range of τ determines the maximum value of the delay encoding vector; the maximum value of the pole number encoding vector is determined based on the range of the number of poles; the number of solutions is determined to be N; the relevant parameters in the initial iteration process are initialized; the iterative calculation is performed based on the relevant parameters; The solution x in the population with the smallest δ * , get the number of poles and delays it contains, and perform the above steps to get new poles; according to the number of poles, delays and new poles obtained by the above steps, use vector fitting technology to calculate the modulus of the propagation function matrix Fitting, calculate the fitting error, and output the fitting result and fitting error. The above-mentioned method in the present invention introduces a differential evolution algorithm, which can solve this nonlinear optimization problem well, and improves efficiency.

The invention relates to the technical field of integrated circuits, in particular to a parallel pseudo-CSD encoder used for variable coefficient multipliers. The parallel pseudo-CSD encoder of the present invention comprises an operation logic circuit and an output logic circuit; the input terminal of the operation logic circuit is connected with external input data, and its output terminal is connected with the first input end of the operation logic circuit; the output terminal of the output logic circuit The second input terminal is connected to external input data, and its output terminal is connected to the coefficient input terminal of the subsequent multiplier. The beneficial effect of the present invention is that while ensuring that the code system after the pseudo-CSD encoding has the same number of non-zero bits as the traditional CSD encoding, parallel operation logic is used to eliminate the carry propagation logic generated in the traditional CSD encoding process, thereby improving the pseudo-CSD The operation speed of the encoder makes it irrelevant to the length of binary digits to be encoded, and belongs to a fixed-delay encoding circuit, which greatly improves the data throughput capability of the pseudo-CSD encoder. The invention is especially applicable to parallel pseudo-CSD encoders with variable coefficient multipliers.

The invention discloses an optical path delay encoding method and encoding system. The method includes the following steps: acquiring one or more beams of optical pulse signals, and inputting the optical pulse signals into the optical path delay encoding system to obtain a delay Optical pulse sequence; input the delayed optical pulse sequence to a single photon detector in sequence, and the single photon detector performs photon counting detection on the delayed optical pulse sequence to obtain a corresponding counting pulse signal sequence; according to the counting pulse The encoding structure in the signal sequence decodes the count pulse signal sequence. The object of the present invention is to provide an optical path delay encoding method and system, through which the anti-noise performance of the receiving system can be improved, and the time-domain loss caused by the encoding method at the transmitting end in the laser radar detection can be made up. Waste problem, and the encoding system has a simple structure, low implementation cost, high application value, and good operability.

Systems and methods for ultrasound imaging using a delay-encoded harmonic imaging (“DE-HI”) technique is provided. An ultrasound pulse sequence is coded using temporal delays between ultrasound emissions within a single transmission event. This coded scheme allows for harmonic imaging to be implemented. The temporal time delay-codes are applied temporally to multiple different ultrasound emissions within a single transmission event, rather than spatially across different transmitting elements. The received radio frequency (“RF”) signals undergo a decoding process in the frequency domain to recover the signals, as they would be obtained from standard single emissions, for subsequent compounding. As one specific example, a one-quarter period time delay can be used to encode second harmonic signals from each angle emission during a single multiplane wave (“MW”) transmission event, rather than inverting the polarity of the pulses as in conventional MW imaging.

A resource identifier to be encoded dynamically upon detection of a triggering event is identified. The resource identifier is allowed to remain not encoded prior to detection of the triggering event. The triggering event that will cause the resource identifier to be consumed by a web browser is detected. In response to detecting the triggering event, the resource identifier is encoded, and an encoded version of the resource identifier is provided for consumption by the web browser.

The invention relates to an electromagnetic type vibroseis parallel stimulation collecting and mixing record separating method. The method comprises the steps that focus points and an observing system are designed according to a common single focus collecting method, and the number n of vertical stacking times is determined through the experiment to serve as the number of focuses of parallel stimulation; n electromagnetic type vibroseises are arranged on the n focus points along a measuring line, the initial phase and stimulation delay encoding is carried out on scanning signals, the n focuses can be stimulated n times nearly at the same time, and n mixing records are obtained; the n focuses are integrally moved to the subsequent n focus points along the measuring line, and parallel stimulation continues to be carried out. Compared with an existing common single focus collecting method, if n focus parallel stimulation is utilized, a same number of focus points are collected, the work finishing time is 1 / n of the working finishing time of the common single focus collecting method, and in other words, the production efficiency is improved by n times. Production efficiency is greatly improved, effective signals in the obtained single focus records are clear, and waveforms are consistent. The vibroseis earthquake exploring working efficiency can be improved, and the construction cost of the field earthquake exploring is greatly reduced.