It is reported that the Weibo users "Fat Chiang Jiang" is the founder of Chongqing and the founder of the Technology Co., Ltd. In addition, Chongqing Talk Technology Co., Ltd. was established in 2012, the original "Chongqing Talk Culture Communication Co., Ltd.", first changed its business content in May 2015, and changed the person in charge and investors in April 2017 ...
Recently, Weibo netizen "Fat Chiang" released a statement that Xiaomi Mix2 showed the "Dual ADC HD Recording" technology demonstrated at its conference, suspected of violations of three invention patents that have been authorized.
These three patents are: a sound acquisition, processing and reproduction method (CN 102695116), a sound acquisition system (CN 102711006), a sound processing reproducing device (CN 102711032). It is reported that the Weibo users "Fat Chiang Jiang" is the founder of Chongqing and the founder of the Technology Co., Ltd. In addition, Chongqing Talk Technology Co., Ltd. was established in 2012, the original "Chongqing Talking Culture Communication Co., Ltd.", first changed its business in May 2015, and changed the person in charge and investors in April 2017. The company is currently in the research and development stage is a kind of e-commerce based health intelligence product, and the core staff of the R & D team has a long-term experience in Oracle, Intel and other large enterprises.
Although it belongs to entrepreneurial companies, Chongqing is talking about technology and Beijing Xiaomi Technology is not at a layer level. Therefore, it is written in the statement: "In this regard, I will reserve the right to further defend the rights."
Up to now, Xiaomi has not issued a statement on this matter, and whether a truly infringement also requires a professional judgment.
Know the science of double ADC HD recording
Knowing a recording engineer @ 乐 迪 explains dual ADC HD recording:
Dual ADC, it is two analog to digital converters. The mobile phone microphone generates an analog signal, which needs to be converted into a digital signal to implement digital recording, and the ADC is a module from analog to digital conversion. Xiaomi Mix2 corresponds to two analog-to-digital converters, one is a high gain channel (high signal amplification multiple), one is a normal gain channel. When the distant small sound is enlarged, the signal needs to go high gain channel, but the gain will produce distortion, noise and other problems. At this time, another way of sound signals of the normal gain channel, as the sample of the audio processor, participate The process of sound processing, eventually acquired the magnification, and the distortion and noise are relatively small "ideal" signal. The so-called "Dual ADC" HD recording of Xiaomi Mix2 is roughly this principle. This is a selling point, or the new model, as a mobile phone, its main function is not a recording, so it said that "HD" recording concept, "HD audio" concept with professional recording is completely different, It is also not used as a high-quality recorder. It is a small voice that can be more clearly enlarged.
Millet to Dual ADC HD Recording
The scientific stickers on Xiaomi community believe that mobile phone recording is often facing a dilemma from far recording, Xiaomi Mix 2 is designed by dual ADC analog to digital converter, allowing recording's dynamic range, effectively incorporated the distant sound, and guarantee The big volume is not broken.
Dual ADC is a high dynamic range recording and HDR recording. The word dynamic range is actually not the unique vocabulary in the audio field. In the camera, the scanner will say that the dynamic range is high, and it is true that the relationship between the maximum and minimum values in the respective fields. The dynamic range of the sound refers to the logarithm value of the maximum non-distortion output power and the system noise output power when the sound system is reproduced. That is, the unit of the maximum sound to the smallest sound is also a range of DB, which is a ratio, which has no relationship with the absolute value of the volume.
When recording with 16bit, the dynamic range of ordinary mobile phone records can be 96dB. Of course, the specific upper and lower limits are different. We use the dynamic range of small mobile phones in the millet + 18dB to -78DB as an example. The millet Mix 2 adopts high dynamic range recording technology. If the existing mobile phone increases the recorded upper limit by 12 dB, the lower limit increases by 18 dB, which means that the equivalent dynamic range increases by 30 dB, reaching 126dB. At present, every MIC in most mobile phones can only correspond to an ADC. Xiaomi Mix 2 is two ADCs per MIC. The two-way ADC recording is used as a professional digital recording pen like Sony PCM-D100. Dual ADC is responsible for incorporating two audio signals, simply understanding "big volume", all the way "small volume", followed by intelligent algorithms, to avoid the volume of the volume or the volume of the volume is too small can not hear.
In fact, this is the same principle as HDR in the camera, and HDR is also integrated by shooting multiple photos, integrating exposure pictures and lack of exposure, ensuring high and wide capacity of the screen. So the high dynamic range of Xiaomi Mix 2 is recorded, which is fully understood as "HDR Recording".
In addition, news from hunting is shown that Chongqing Talk Technology Co., Ltd. has added a recruitment revelation today. It is prepared to recruit an intellectual property legal to deal with the company's important intellectual property dispute. I don't know if this is not going well and Xiaomi is not going well? Still eating a long, a wisdom, layout in advance?
Netizen hot discussion
@ And see below: 1: Look directly to Xiaomi to open an authorization, ask money, 2: The court see. Simple things don't get complicated
@ 殇 殇 流 云: 人家 小米 发 发 引 个 个 同 同 同 同 同,,,,,?,,??, 注, 注 注 注 注 注 注 名 注 注 注Anyway, I don't believe it. . .
@ 数码 小 当家: This microblog, regulate sexual infringement, not too unprofessional, shouldn't you first find a third party?
@ MB00000: Want to pull some popularity? Want to increase your company's popularity?
Original link: https://www.eeboard.com/news/mix2-14/
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