摘要:
A reflective optical data modulator includes a layer of optical material, a front partial optical reflector on a major surface of the layer of optical material, a back optical reflector, and at least two electrodes. The back optical reflector is at or near a portion of a second surface of the layer of optical material and faces the front partial optical reflector. The at least two, electrodes are located to enable application of a voltage across a portion of the layer of optical material. The layer of optical material has an optical absorption dependent on the voltage applied across the electrodes. The front partial optical reflector is an unburied layer structure.
摘要:
A stereo encoding method, a stereo encoding device, and an encoder are provided. The stereo encoding method includes: obtaining a left channel energy relation coefficient and a right channel energy relation coefficient; obtaining a left energy sum and a right energy sum respectively; performing cross correlation between sub-bands of a first monophonic signal at a wave trough and sub-bands of the left channel signal according to the left channel energy relation coefficient, and performing cross correlation between sub-bands of the first monophonic signal at the wave trough and sub-bands of the right channel signal according to the right channel energy relation coefficient; obtaining a scaling factor by using the left energy sum, the right energy sum, and cross correlation results; and encoding the stereo left and right channel signals according to the scaling factor.
摘要:
A stereo encoding method and apparatus are provided, so as to reduce distortion caused by delay adjustment. The stereo encoding method includes: extracting a current interchannel delay of a stereo signal and a previous delay adjacent to the current interchannel delay; performing adjustment frame judgment according to characteristics of the current stereo signal when the current delay and the previous delay are different; and performing delay adjustment on the stereo signal by using the current interchannel delay if it is judged that a frame where the current delay occurs is an adjustment frame.
摘要:
A method and an apparatus for processing a signal are provided. The method includes: obtaining an energy average value of each sub-band for a current frame frequency-domain signal; obtaining a current frame modification coefficient of each sub-band for the current frame frequency-domain signal according to a spectral envelope and the energy average value of each sub-band; obtaining a weighted modification coefficient of each sub-band for the current frame frequency-domain signal by using the current frame modification coefficient and a relevant frame modification coefficient; and modifying the spectral envelope of each sub-band for the current frame frequency-domain signal by using the weighted modification coefficient.
摘要:
A method for estimating inter-channel delay and an apparatus for estimating inter-channel delay and an encoder are provided by the embodiments of the present invention. The method includes: obtaining signal sound field information from a cross-correlation function and a cumulative cross-correlation function of synthetic signals of left and right sound channels respectively; obtaining adjustment information of the cumulative cross-correlation function according to the sound field information that is respectively obtained; adjusting the cumulative cross-correlation function by using the adjustment information, so as to obtain the adjusted cumulative cross-correlation function; and determining a time corresponding to a maximum value in the adjusted cumulative cross-correlation function as an inter-channel delay. Therefore, the delay between the signals of the left and right sound channels can be estimated correctly, so as to improve the stability of the synthetic stereo sound field.
摘要:
A baculovirus expression vector achieves dual functions of (1) subunit vaccine by displaying the influenza surface protein for humoral immune responses; and (2) DNA vaccine by expressing influenza surface protein for long-acting cellular immune response. A method for inducing immunogenicity in a host is also disclosed.
摘要:
A capacity and density enhancement circuit for a sub-threshold memory unit array which can decrease the drain current in the bit lines and enhance the pull-up capability of memory cells. The capacity and density enhancement circuit is composed of a first enhancement transistor, a second enhancement transistor, a first mask transmission gate, a second mask transmission gate, a first logic memory capacitor and a second logic memory capacitor.
摘要:
The present invention discloses a method for obtaining an attenuation factor. The method is adapted to process the synthesized signal in packet loss concealment, and includes: obtaining a change trend of a signal; obtaining an attenuation factor, according to the change trend of the signal. The present invention also discloses an apparatus for obtaining an attenuation factor. A self-adaptive attenuation factor is adjusted dynamically by using the latest change trend of a history signal by using the present invention. The smooth transition from the history data to the data last received is realized so that the attenuation speed is kept consistent between the compensated signal and the original signal as much as possible for adapting to the characteristic of various human voices.
摘要:
The present invention discloses a method for performing a frame erasure concealment to a higher-band signal, including: calculating a periodic intensity of a higher-band signal with respect to a lower-band signal; judging whether the periodic intensity of the higher-band signal is higher than or equal to a preconfigured threshold; if the periodic intensity of the higher-band signal is higher than or equal to the preconfigured threshold, using a pitch period repetition method to perform the frame erasure concealment to the higher-band signal of a current lost frame; and if the periodic intensity of the higher-band signal is lower than the preconfigured threshold, using a previous frame data repetition method to perform the frame erasure concealment to the higher-band signal of the current lost frame. The present invention further discloses a device for performing a frame erasure concealment to a higher-band signal and a speech decoder. The problem that the quality of the voice signal is lowered is avoided.