Huawei Technologies Co., Limited

Byd Company Limited

Bo Qu

Liping Wang

Junkai Feng

Baicheng Du

YiFei Zhao

Dawei Lv

An encoding method and an encoder are provided to improve image compression performance. An embodiment of the encoding method determines an encoding quantization parameter, QP, and precodes a to-be-encoded block using the encoding QP to obtain encoding result information. The encoding QP is then adjusted based on the encoding result information, and then real encoding is performed on the to-be-encoded block by using an adjusted encoding QP. An embodiment of the encoder includes a bit rate control module to determine a first QP, and a precoding module to precode a to-be-encoded block using the QP to obtain precoding result information. The encoder further includes another bit rate control module to adjust the QP based on the precoding result information to obtain a second QP, and a real encoding module to encode the to-be-encoded block using the second QP.

Precoding encoding method and encoder for QP adjustment

This application provides example encoding methods and example encoders. One example method includes performing bit truncation on a to-be-encoded block when a bit rate control condition is satisfied. A first cost value corresponding to the bit truncation can then be calculated. The to-be-encoded block can then be predicted to determine a prediction residual of the to-be-encoded block when the bit rate control condition is satisfied. A second cost value corresponding to the prediction can then be calculated based on the prediction residual. The first cost value can then be compared with the second cost value to determine an encoded bit.

Encoding method and encoder

Bi-directional direct current (DC) power circuit having: a signal processing module for processing feedbacks of output voltage and voltage drop, and outputting pulse control and directional control signals; a pulse width modulation (PWM) module for outputting pulse signals in response to the control signals from the signal processing module; and a switch rectifying module for switching on and off in response to the pulse signals from the PWM module. The pulse control signal from the signal processing module can be in response to an input current signal from a sense resistor. The circuit is capable of achieving both step-up and step-down voltage conversions.

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Xi'an, China

Bo Qu