Bluestone Technology has developed industry-leading voice synthesis LSI specifically for AVAS for electric vehicles
Time:2023-11-18
Views:576
By utilizing hardware configuration and GUI * 1 software, the development cycle can be significantly reduced
Blue Blue Blue Stone Technology Co., Ltd. (hereinafter referred to as "Blue Blue Stone Technology"), a subsidiary of the Rom Group, has developed a voice synthesis LSI "ML22120xx" (ML22120TB, ML22120GP) dedicated to AVAS (Vehicle Proximity Alarm System) for electric vehicles (xEVs).
In the process of promoting a carbon neutral (carbon free) society, the number of hybrid electric vehicles and pure electric vehicles (EVs) is constantly increasing. Due to the fact that these vehicles do not emit significant noise when driven by electric motors, relevant laws and regulations require these vehicles to be equipped with warning sounds that remind pedestrians to pay attention to approaching vehicles. When using a microcontroller to generate warning tones, it is necessary to control the pitch and volume of the sound to achieve a smooth gradient effect, and adjust the frequency characteristics according to the shape of the vehicle. This also greatly increases the burden of microcontroller software development and requires verification of the operation between the microcontroller and other software processing. In response to these issues, Bluestone Technology has utilized its accumulated experience and technological advantages in the field of speech synthesis LSI to achieve high audio quality through hardware configuration, and has launched new products that help alleviate the development burden of AVAS (Vehicle Approach Alarm System).
The "ML22120xx" is composed of dedicated hardware with warning sound generation function, sound gradually increasing and decreasing function, and equalizer function. In addition, by using specialized GUI software, it is easy to meet the requirements of relevant laws and regulations for volume and frequency characteristics required by AVAS * 2.
The new product is composed of hardware, and compared to products composed of microcontrollers, there is no need for software validation, which can significantly shorten the development cycle. In addition, the new product can be controlled with simple commands, and compared to the ordinary method of generating sound by a microcontroller, it can emit a warning sound in less than 1/10 of the time. In addition, the new product is also equipped with fault detection function, which can detect communication abnormalities with the main microcontroller and abnormal oscillations caused by external components, which helps to improve the reliability of the application product.
The new product has been temporarily put into mass production with a monthly production capacity of 100000 units starting from September 2023 (sample price: 1000 yen/unit, excluding tax). The ML22120TB and its evaluation board have started to be sold through e-commerce, and can be purchased through e-commerce platforms such as Ameya360 and Oneyac. The production base for the previous process is Blue Blue Blue Stone Semiconductor Miyagi Factory (Miyagi Prefecture), while the production base for the subsequent process is ROHM Integrated Systems (Thailand) Co., Ltd. (Thailand).
<Product lineup>
<Application examples>
AVAS (vehicle approaching alarm system), exterior warning sound (sliding door open/close sound, charging completion sound), etc
<Supporting Information>
The product overview is presented on the speech synthesis LSI product page of the following Rom official website: https://www.rohm.com.cn/lapis-tech/product/speech/ml22120
<Evaluation board and GUI software information>
The evaluation board "RB-D22120TB32" and dedicated GUI (Graphical User Interface) software are provided in the form of a sound device control kit "SDCK3". With this kit, customers can easily evaluate a series of processes from generating audio data to correcting and listening to warning tones.
＜E-commerce Sales Information＞
Online sales platforms: Ameya360, Oneyac
The ML22120TB and its evaluation board will gradually be released on other e-commerce platforms.
(Sales started in November 2023)
・ Product information
Product model: ML22120TBZ0B-MX
Evaluation board model: RB-D22120TB32
Sound device control kit model: SDCK3
＜Glossary＞
*1) GUI (Graphical User Interface)
A computer operation user interface that displays graphics and images, and can be operated using a mouse or touch screen.
*2) Legal and regulatory provisions
The United Nations Economic Commission for Europe (UN/ECE) World Forum for Harmonization of Vehicle Regulations (WP29) passed the mandatory provision of AVAS (Acoustic Vehicle Alerting System) in the "Agreement on Silent Vehicles (No. 138)". Among them, regulations are made for the volume of vehicle approaching warning tones and the frequency at specific vehicle speeds.
＜About RoHM＞
Founded in 1958, ROHM began with the production of its main product - resistors. After more than half a century of development, it has become a world-renowned semiconductor manufacturer. Rom‘s corporate philosophy is: "We always prioritize product quality. No matter how difficult we encounter, we will continuously provide a large number of high-quality products to domestic and foreign users, and contribute to the progress and improvement of culture.
Rom‘s production, sales, and research and development network is distributed around the world. The product involves multiple fields, including IC, discrete components, optical components, passive components, power components, modules, etc. In the world electronics industry, Rom‘s numerous high-quality products have been licensed and praised by the market, becoming a leading enterprise in system IC and advanced semiconductor technology.
[Regarding the business development of RoHM in China]
Sales outlet: Initially established in 1974, Rom Semiconductor Hong Kong Limited. Rom Semiconductor (Shanghai) Co., Ltd. was established in 1999, Rom Semiconductor (Shenzhen) Co., Ltd. was established in 2006, and Rom Semiconductor (Beijing) Co., Ltd. was established in 2018. In order to quickly and accurately respond to the requirements of the expanding Chinese market, Rom has established a vertical integration system in China that integrates development, sales, and manufacturing, similar to its headquarters. As a characteristic of Rom, we actively carry out sales activities that are "close to customers" and strive to provide thoughtful services to customers. At present, there are a total of 20 sales outlets in China, including 4 sales companies in Hong Kong, Shanghai, Shenzhen, and Beijing, as well as 16 branches (branches: Dalian, Tianjin, Qingdao, Nanjing, Hefei, Suzhou, Hangzhou, Ningbo, Xi‘an, Wuhan, Dongguan, Guangzhou, Xiamen, Zhuhai, Chongqing, Fuzhou). And, the distribution network is gradually expanding.
Technical Center: We have technical centers and QA centers in Shanghai and Shenzhen, and North China Technical Center in Beijing, providing technical and quality support. The technical center is equipped with development and design support personnel who are proficient in various markets, and can provide comprehensive solutions from software to hardware to provide technical proposals tailored to customer needs. Moreover, when there is a defect in the product, the QA center will respond to the appeal within 24 hours.
Production base: In 1993, production factories were established in Tianjin (Rom Semiconductor (China) Co., Ltd.) and Dalian (Rom Electronics Dalian Co., Ltd.), respectively. We produce diodes, LEDs, laser diodes, LED displays, and optical sensors in Tianjin, and power modules, thermal printing heads, contact image sensors, and optical sensors in Dalian. As the main production base of Roma, we continuously provide high-quality products to both domestic and international markets.
Social contribution: Roma is also committed to strengthening cooperation with numerous research institutions and enterprises both domestically and internationally, and actively promoting research and development activities of industry university research cooperation. In 2006, we signed a joint framework agreement with Tsinghua University to actively engage in the development of advanced technology for electronic components. In 2008, a donation was made to build the "Tsinghua Roma Electronic Engineering Museum" within Tsinghua University, which was completed in April 2011. In 2012, the "Tsinghua Rom Joint Research Center" was established at Tsinghua University, engaged in joint research projects such as optical components, communication broadcasting, biochips, SiC power device applications, non volatile processor chips, sensors and sensor network technology (structural facility health monitoring), artificial intelligence (machine health detection), and so on. In addition to Tsinghua University, Rom has also collaborated with multiple well-known universities in China to achieve fruitful results.
Based on the accumulated technical strength, high quality, and reliability over the years, Rom will establish a solid cooperative relationship with customers through a solid technical support and customer service system that integrates development, production, and sales. As a rooted enterprise in China, Rom will make positive contributions to improving customer product strength, business development, and China‘s energy conservation and environmental protection cause.
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