Offline keyword recognition system partition upgrade method

Abstract

The invention discloses a partition upgrade method for an offline keyword identification system. By dividing the NOR FLASH into a BootLoader code area, a partition table storage area, an application program area, a front-end algorithm area, a keyword model area, a broadcast file area, and a data backup area The design solves the problem that the entire NOR FLASH needs to be erased and the upgrade fails to be unrecoverable when the traditional firmware upgrades a small part of the program; it achieves the purpose of shortening the system upgrade time, recovering abnormal upgrades, and improving the reliability of the system upgrade.

Description

technical field [0001] The invention relates to an upgrade technology of a single-chip microcomputer (MCU), in particular to a partition upgrade method for an offline keyword recognition system. Background technique [0002] Keyword recognition technology has been developed since the 1970s. So far, it has been relatively mature in theoretical research, but it has not been widely used for a long time due to the influence of chip performance, manufacturing cost, market demand and other factors in application. [0003] With the rapid development of microcomputer technology (MCU) and the improvement of chip integration and performance, these unfavorable factors are gradually alleviated, which greatly promotes the development of keyword recognition products. In an offline keyword recognition system, it is generally not necessary to connect to a speech recognition server, but to perform sound collection, front-end processing, and keyword matching locally. Such systems can typical...

AI Technical Summary

Problems solved by technology

This method is applied to the scene where the system is relatively simple and the firmware structure is relatively single, and has the advantages of relatively simple implementation and simple upgrade program implementation. However, as microcomputers are more and more widely used in daily life, the application scenarios become more and more Complex, especially in the application scenario of the offline keyword system, the system firmware is not only program logic code, but also includes audio algorithm code, keyword model data, broadcast audio data, etc. Due to the existence of these data, the entire system firmware is also It becomes bigger and bigger. If you still use the whole block upgrade method, the upgrade time will be too long, the remote upgrade will take up a lot of bandwidth, and the upgrade cost will be increased.

And in the actual system upgrade process, there are many uncontrollable external interferences, such as sudden power failure of the device during the upgrade process, data communication failure, firmware data transmission error, etc., resulting in the failure of the system upgrade and the failure of the device to start normally.

There are also some upgrade scenarios that may only need to upgrade a part of the entire firmware. If the entire non-volatile memory is erased due to this small part of the update, it will also reduce the service life of the non-volatile memory

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