9 results about "Client buffer" patented technology

The invention discloses an adaptive video stream optimization and transmission method and system, and the method comprises the steps: segmenting a video stream into fragments, and dynamically adjusting the fragment duration according to the proportion of a dynamic scene in the fragments; the method comprises the following steps: pre-analyzing a scene complexity label in head metadata of a fragment before decoding of a client, and dynamically selecting a decoding resolution and a frame rate of the fragment in combination with a current equipment screen refresh rate and environment illumination intensity sensor data; and in the transmission process, if it is detected that the buffer area occupancy rate of the client side is lower than a dynamic first threshold value based on the product of the network round-trip time and the fragment average code rate, a pseudo fragment filling mechanism is triggered. According to the invention, through scene intelligent perception, dynamic resource allocation and end-to-end cooperative control, the limitation of single-point optimization of a traditional scheme is broken through, and the problems caused by complexity difference of video contents and dependence of buffer management on a fixed threshold are solved.

The invention provides a forward security dynamic symmetric searchable encryption method and system for IO efficiency optimization, and belongs to the technical field of information security, and the method comprises the steps: S1, determining and initializing a to-be-optimized bottom layer forward security dynamic symmetric searchable encryption scheme, parameters and data structures of all parties including a client buffer area; s2, buffering update in a client, executing batch update until a fixed buffer upper limit is reached, packaging all updates in a buffer area through special security packaging and uploading, and storing auxiliary search information by using a bottom layer forward security dynamic symmetric searchable encryption scheme; and S3, retrieving auxiliary search information by using a bottom layer forward security dynamic symmetry searchable encryption scheme, extracting updates in a package on the server through the auxiliary search information, combining to obtain a server end result, and further combining with other updates in a client buffer area to obtain a final result. According to the method, the search efficiency of the high-frequency keywords is effectively improved.

Disclosed herein is a backtesting system comprising a user device and a service device. The user device comprises a user memory storing instructions causing a processor to display a primary interface for backtesting session selection, communicate via an event-based communication session with the service device, requests and delta-decodes price data, store the delta-decoded price data in a client buffer, and render a backtesting chart based on a simulation time and the price data corresponding to the simulation time. The service device includes a service memory storing instructions that cause a service processor to establish the communication session, retrieve backtesting session data, select historical data for financial instruments based on the backtesting session data and store the historical data in a service buffer of price data, delta-encode the price data, and transmit the delta-encoded price data to the user device.

A recorded event presentation system, including a camera that is adapted to capture and provide a video stream at a resolution. An originating client is adapted to receive the video stream from the camera at the resolution and provide the entire video stream at the resolution across a network at a variable bandwidth. When the bandwidth is relatively larger, then the video stream is provided at the resolution at a relatively faster speed. When the bandwidth is relatively smaller, then the video stream is provided at the resolution at a relatively slower speed. A server is adapted to receive the video stream from the originating client, and provide the video stream to a viewing client.

This invention proposes a forward-secure dynamic symmetric searchable encryption method and system with optimized I / O efficiency, belonging to the field of information security technology. The method comprises the following steps: S1: determining and initializing the underlying forward-secure dynamic symmetric searchable encryption scheme, parameters, and various data structures including the client buffer to be optimized; S2: buffering updates on the client until a fixed buffer limit is reached, executing batch updates, encapsulating all updates in the buffer using a special secure package and uploading them, while simultaneously storing auxiliary search information using the underlying forward-secure dynamic symmetric searchable encryption scheme; S3: retrieving the auxiliary search information using the underlying forward-secure dynamic symmetric searchable encryption scheme, extracting the updates in the package on the server using the auxiliary search information, combining them to obtain server-side results, and further combining them with other updates in the client buffer to obtain the final result. This method effectively improves the search efficiency of high-frequency keywords.

Disclosed herein is a backtesting system comprising a user device and a service device. The user device comprises a user memory storing instructions causing a processor to display a primary interface for backtesting session selection, communicate via an event-based communication session with the service device, requests and delta-decodes price data, store the delta-decoded price data in a client buffer, and render a backtesting chart based on a simulation time and the price data corresponding to the simulation time. The service device includes a service memory storing instructions that cause a service processor to establish the communication session, retrieve backtesting session data, select historical data for financial instruments based on the backtesting session data and store the historical data in a service buffer of price data, delta- encode the price data, and transmit the delta-encoded price data to the user device.

The application relates to the field of computer networks, and particularly provides a video transmission code rate control method and system based on a QUIC protocol, a terminal and a medium. The method comprises the following steps: in the process of video data transmission of a QUIC connection, a service end transmission layer receives an ACK frame of a client, and the throughput is calculated based on the ACK frame; the throughput is filtered by using a Kalman filter to obtain a stable throughput; the current playing code rate and the current video buffer level of the client are acquired in an application layer, and a video segment with a target code rate is selected based on the stable throughput, the current playing code rate and the video buffer level and is sent to the client. Through the Kalman filtering throughput estimation based on the ACK frame of the transmission layer of the QUIC protocol and the cross-layer combination of the application layer client buffer level, the accuracy, stability and video playing fluency of the code rate selection are effectively improved.

A recorded event presentation system, including a camera that is adapted to capture and provide a video stream at a resolution. An originating client is adapted to receive the video stream from the camera at the resolution and provide the entire video stream at the resolution across a network at a variable bandwidth. When the bandwidth is relatively larger, then the video stream is provided at the resolution at a relatively faster speed. When the bandwidth is relatively smaller, then the video stream is provided at the resolution at a relatively slower speed. A server is adapted to receive the video stream from the originating client, and provide the video stream to a viewing client.

The application discloses a GNSS network reference station system data scheduling method based on an MPTCP protocol, belongs to the technical field of data scheduling, and can make multiple same data packets be simultaneously transmitted on multiple paths by modifying a data transmission process of the MPTCP protocol, thereby solving the unstable connection problem caused by the single path transmission limitation of the Ntrip protocol; and a client buffer pool is designed to store different types of data, so that even if data packet loss occurs on one path, the client can still quickly select the data packet from the remaining paths, thereby reducing the risk of data packet loss; in addition, the method for dividing the buffer pool to store data also solves the buffer pool overflow problem of the MPTCP protocol multi-path data transmission, simultaneously divides the transmission data into two categories according to importance, and stores the data in different buffer pools, so as to reduce the data out-of-order phenomenon and improve the real-time performance of differential data transmission.