In the first half of 2017, internet brand TVs held conferences to unveil their new product lines. This year, they all highlighted a common feature: voice recognition. If you have a longer-term view of internet brand TVs, you’ll notice that the “voice†function is no longer a novelty. However, when paired with the emphasis on “intelligence,†it has become a new breakthrough point.
The optimization of voice recognition technology has never ceased. I remember that in Microsoft Office 2003, local voice recognition was already introduced. Back then, voice recognition required prior “learning†and suffered from low accuracy and slow speed. Later, Apple’s Siri helped popularize voice recognition on mobile devices. For TV products, voice recognition involves three main aspects: hardware foundation, speech recognition technology, and system optimization to enable more applications.
To verify the differences in voice recognition, we tested three TV models, including Xiaomi TV 4A and Micro Whale. First, let’s look at the WiFi + BT hardware specifications of the four TVs:
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From the table, we can see that Xiaomi TV 4A and Micro Whale TV are equipped with 802.11AC wireless network cards and support Bluetooth 4.1+. The mainstream Micro Whale model supports 802.11n and 2.4G + 5G transmission, while another model only supports 2.4G.
The chip models used are as follows:
- Micro Whale high-end: BCM43569 module
- Micro Whale mainstream 1: BCM43242 module
- Micro Whale mainstream 2: RTK8192 module
- Xiaomi 4A: BCM43455 module
While many users may think Xiaomi TV 4A has superior wireless specs, it actually uses a single-issue, single-receive (1T1R) antenna design. The other three models use dual-transmit, dual-receive designs.
Why does this matter? Let’s take an example: even if Xiaomi TV 4A uses a high-level chip, like driving on the Beijing Second Ring Road during rush hour, WiFi and Bluetooth coexistence can cause data congestion. In contrast, the Micro Whale TV 2, despite using a 2.4G 802.11n card, benefits from its dual design, resulting in more stable and faster performance.
To confirm these assumptions, we conducted real-world tests in a shielded room. We tested both basic rate data and user scenarios, simulating home environments.
Test 1: In the shielded room, Xiaomi’s wireless transmission was significantly worse. At 2.4G, Xiaomi 4A performed worse than all three Micro Whale models. In the 5G environment, Xiaomi 4A outperformed older Micro Whale models, but not by much.
Test 2: In real-world scenarios, Xiaomi 4A’s signal was less stable. At 1m and 3m, it lagged behind Micro Whale by about 20%. At 5m, it was better, but at 10m, it was 30% worse. This aligns with our previous findings.
Bluetooth coexistence tests showed Xiaomi 4A struggling across all scenarios. The decline in performance was more severe compared to Micro Whale models.
Limit draw tests revealed that Xiaomi 4A had the worst performance in 2.4G coexistence scenarios, affecting over 50% of Wi-Fi performance due to its 1T1R design.
Voice recognition tests also showed Xiaomi 4A slightly underperforming compared to Micro Whale models, with a 20% gap in accuracy at various distances.
Wireless technology is becoming increasingly important. As TVs evolve, wireless solutions will make living spaces cleaner and more convenient. While Xiaomi 4A aims to eliminate cable constraints, it still falls short in some areas. True voice service requires comprehensive optimization from hardware to software.
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