Analysis of the similarities and differences between speech chip and speech synthesis chip
Speech synthesis technology is an important part of leading the information society and an important means for the majority of manufacturers to enhance the value of their products. To allow customers to use the product better than to communicate directly with the machine. The means of realizing machine speech is the two major solutions of hardware and software, and the hardware solution mainly includes two major programs of speech chip and speech synthesis chip. Since the introduction of OSYNO6188, the first domestic Chinese speech synthesis chip (also called Chinese TTS chip) in China in 2003, Beijing Yuyin Tianxia Technology Co., Ltd., the audible chips on the market have been officially divided into two categories: speech chips and speech synthesis chips. However, in the actual development of voice terminal products, many R & D personnel often have conceptual confusion about these two types of chips, often confusing the voice synthesis chip as the voice chip, plus some companies that make and sell voice chips. In order to better sell, in order to highlight the comparative price advantage of voice chips, they also announced that their voice ICs are voice synthesis chips, and consciously mislead developers. In fact, the two are completely different in nature.
For example, when the user needs a voice terminal that is finally developed to provide a large number of different voice real-time prompts-such as an on-board instrument that detects fuel speed and other functions, a real-time report on the current fuel volume and speed is required; or similar GPS Navigation, prompting that it is located on XX street, what is the current prescribed speed on the road, maybe the voice chip developer claims that there is no problem, but it is the same for different streets in different provinces and cities, so you must use a voice synthesis chip . The use of the voice chip is used when there are relatively fixed and fewer voice information prompts. For example, this chip is used to manually report a station on a certain bus, or to sound an alarm when a fire comes. The voice chip is suitable. This way you will know exactly what type of chip you need.
Next, you can make a more formal definition of them. The so-called voice chip refers to the conversion of voice signals into numbers by sampling, stored in the ROM of the IC, and then restores the numbers in the ROM to voice signals through the circuit. The so-called voice synthesis chip, also known as Chinese TTS chip, refers to a professional voice chip, which can communicate with the main control CPU through serial communication interfaces such as UART and SPI, receive text messages transmitted by the CPU, and The text information is converted into a synthetic voice method to drive the sounder to sound. Its characteristics are: high integration, built-in Chinese TTS function, with serial communication interface and the support of certain peripheral circuits.
Judging from the method of use, the main method of using the voice chip is to record it first, and then use it after the recording is completed. The speech synthesis chip only needs the host computer to send a piece of text information to it through serial communication, and then convert the text information into a voice signal. From the point of view of the use, because the length of the prompt voice segment recorded by the voice chip is limited, in a situation where only a small amount of prompt voice is required and can be applied on a large scale, it is suitable to use the voice chip because its cost is not high; the disadvantage is that it requires Pre-recorded voice, re-burning, and verification are required, which is actually very troublesome for many R & D companies-especially when these developed voice terminals are sold to different users, they need to use different voice recordings Documents will consume a lot of valuable costs for R & D personnel. The speech synthesis chip can flexibly use the text information provided by the host computer, and it can be automatically converted into output sound, thereby generating a large number of applications in intelligent human-computer interaction. The disadvantage is that the intelligent analysis ability cannot reach 100% correct speech Voice (naturalness is still slightly different from human voice) and the cost is slightly higher than ordinary voice chips.
From the definition of the speech synthesis chip, we can know that it belongs to a high-end speech chip, which is a completely different intelligent chip that adopts speech synthesis technology. It has built-in Chinese TTS software or speech synthesis software core. From the perspective of future market development and user experience requirements, perhaps one day the speech synthesis chip will eventually replace the current position of the speech chip, of course, it will take a long time, or eventually the two may not be one. Now it can only be said that the future speech synthesis chip will have a higher degree of natural synthesis effect, lower cost, more convenient control and multilingualization.
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