公开(公告)号：US20220094933A1

公开(公告)日：2022-03-24

申请号：US17539945

申请日：2021-12-01

Applicant: Texas Instruments Incorporated

Inventor： Do-Kyoung Kwon ,  Jing-Fei Ren ,  Darnell Moore

IPC: H04N19/124 ,  H04N13/161 ,  H04N19/137 ,  H04N19/182 ,  G06T7/593

Abstract: This disclosure describes techniques for performing semi-global matching (SGM) path cost compression. In some examples, the techniques may perform disparity-dependent sub-sampling of a set of SGM path costs where the sub-sampling ratio is determined based on a candidate disparity level. The sub-sampled SGM path costs may be stored in a memory. When retrieved from memory, the sub-sampled SGM path costs may be interpolated to reconstruct the other path costs not stored in the memory. The reconstructed path costs may be used for further SGM processing. In further examples, the techniques may perform disparity-dependent quantization on the SGM path costs or the sub-sampled SGM path costs, and store the quantized SGM path costs in memory. The techniques of this disclosure may reduce bandwidth as well as reduce the memory footprint needed to implement an SGM algorithm.

公开(公告)号：US10141981B2

公开(公告)日：2018-11-27

申请号：US15658637

申请日：2017-07-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Pourya Assem ,  Hun Seok Kim ,  Jing-Fei Ren ,  Srinath Mathur Ramaswamy

IPC: H04B5/00 ,  H04B17/318 ,  H04W4/02 ,  H04W4/80 ,  H04B17/27

Abstract: Methods and apparatus to determine nearfield localization using phase and received signal strength indication (RSSI) diversity are disclosed. An example method includes determining a first strength of an electric field and a second strength of a magnetic field, the electric field and the magnetic field associated with an electromagnetic signal sent from a transmitter; determining a difference between the first strength and the second strength; and determining a transmitter distance based on the difference between the first strength and the second strength.

公开(公告)号：US09584542B2

公开(公告)日：2017-02-28

申请号：US14614038

申请日：2015-02-04

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Hun-Seok Kim ,  Anand Ganesh Dabak ,  Jing-Fei Ren ,  Manish Goel

IPC: H04L29/06 ,  H04L29/08 ,  H04L9/32 ,  H04W12/12

CPC classification number: H04L63/1466 ,  H04K1/003 ,  H04K3/25 ,  H04K3/46 ,  H04K3/65 ,  H04K3/827 ,  H04K3/86 ,  H04K2203/22 ,  H04L9/3271 ,  H04L67/12 ,  H04L2209/805 ,  H04W12/12

Abstract: An apparatus for preventing a relay attack that includes a microcontroller, a receiver, and a transmitter. The receiver is configured to receive a challenge message from a verifier. The challenge message has a challenge message frequency at a first challenge message frequency during a first time slot. The transmitter is configured to transmit a response message to the verifier. The response message has a response message frequency at a first response message frequency during the first time slot. The first response message frequency is different than the first challenge message frequency. The challenge message frequency is at a second challenge message frequency and the response message frequency is at a second response message frequency during a second time slit. The second challenge message frequency is different than the second response message frequency.

Abstract translation: 一种用于防止包括微控制器，接收器和发射器的中继攻击的装置。 接收器被配置为从验证器接收挑战消息。 挑战消息在第一时隙期间在第一挑战消息频率处具有挑战消息频率。 发送器被配置为向验证者发送响应消息。 响应消息在第一时隙期间具有在第一响应消息频率处的响应消息频率。 第一响应消息频率与第一挑战消息频率不同。 挑战消息频率处于第二挑战消息频率，并且响应消息频率在第二时间缝隙期间处于第二响应消息频率。 第二挑战消息频率与第二响应消息频率不同。

公开(公告)号：US20150278008A1

公开(公告)日：2015-10-01

申请号：US14224960

申请日：2014-03-25

Applicant: Texas Instruments Incorporated

Inventor： Jing-Fei Ren ,  Manish Goel ,  Yuming Zhu

IPC: G06F11/10 ,  H03M13/09 ,  H04L1/00

CPC classification number: H03M13/09 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0061 ,  H04L1/16

Abstract: A communication system includes digital transmitter circuitry (26) including a CRC (cyclic redundancy check) generator circuit (28) generating a first CRC code based on a message and appending the CRC code to the message a first data packet, and circuitry (26-1,2,3) transforming the first data packet to provide a second data packet and transmitting it. Digital receiver circuitry (120) includes circuitry (12-1,2,3) receiving the second data packet, a CRC verification circuit (14-1) comparing a received digital CRC code portion of the second data packet to a calculated digital CRC code portion including any introduced error to detect the existence of any error in the second data packet. The message is presented for further processing if no error is detected, and a CRC-based FEC (forward error correction) circuit (14-2) receives the message and calculated digital CRC code from the verification circuit if an error is detected, corrects the detected error, and indicates the error is uncorrectable if the correction is unsuccessful.

Abstract translation: 通信系统包括数字发射机电路（26），包括CRC（循环冗余校验）发生器电路（28），其基于消息生成第一CRC码，并将CRC码附加到消息第一数据包，以及电路（26- 1,2,3）转换第一数据分组以提供第二数据分组并发送它。 数字接收机电路（120）包括接收第二数据分组的电路（12-1,2,3），将第二数据分组的接收数字CRC码部分与计算出的数字CRC码进行比较的CRC校验电路（14-1） 部分包括任何引入的错误，以检测第二数据分组中是否存在任何错误。 如果没有检测到错误，则呈现用于进一步处理的消息，并且如果检测到错误，则基于CRC的FEC（前向纠错）电路（14-2）从验证电路接收消息和计算的数字CRC码，校正 检测到错误，并指示错误是不可校正的，如果更正不成功。