Intel Corporation

Chinese Academy of Sciences

Hao Ruan

Andrey Vladimirovich Belogolovy

Longcheng Zhu

Xupeng Yuan

Jeffrey Boyd

Qiao Hu

Xinjun Guo

A radial servo control device for a super-resolution optical disc includes an excitation light source, a servo light source, an integrated optical path, focusing units, a servo light detecting unit and a drive control unit; the drive control unit presets N detection error reference values with respect to each guide layer trench irradiated by servo light, and controls corresponding positions of the focusing units in N data tracks below each guide layer trench according to a comparison result between a detection result of servo reflected light and the detection error reference values. The device is applicable to a variety of super-resolution optical discs on the basis of stimulated radiation loss microscopy technology, a two-photon absorption technology, and the like, and achieves accurate radial servo control of super-resolution data tracks (&#x3c;100 nm) without reducing the wavelength of servo light and the width of guide layer trenches.

Radial servo device for super-resolution optical disc and servo control method therefor

Systems and methods of reducing transmission time are described. Uniform-sized original packets are generated from a data frame having a payload with an identifier and data. The packets include the identifier, total block number, block index that specifies an order of the packet, and the data. The packets are encoded to form redundant packets with the identifier, block number, block index and redundant data. The available block index for the original and redundant packets are different. The packets are transmitted by individual modems over different channels at transmission rates that are each configured to minimize free space in an input buffer of the modem and are dependent on feedback from the receiver. The feedback indicates a difference between the transmission rate and a reception rate. The encoding rate is dependent on the original packets over the original and redundant packets or a maximum transmission rate over the remaining transmission rates.

Transmission latency reduction

Growing community of inventors

Shanghai, China

Hao Ruan