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音频串流的未来:从一直听到一直串流

由  Satoshi Terada 发布  - 12-19-2019 

由于互联网的演进,音乐产业近几年有了很大发展。我们很高兴看到该行业重新获得了关注,因为商业模式本身已从套装软体媒体的销售发展到下载数字数据的销售,直至现在可随处供任何人欣赏的串流音频。这都可以归因于智能手机和高速通信。

在套装软体媒体是主流时,紧凑的CD播放器由于其便携性而获高度青睐,尽管有一些小缺点。从CD播放器发展到便携式听音设备,当我们能够从个人计算机或“数字中枢”下载音乐数字数据时,我们全神贯注。“把1000首歌装进您的口袋里”的说法用来描述技术的飞跃,我们能够将下载的歌装入硬盘 (HDD)和Silicon Storage。

如今,借助最新的无线通信技术,用户可以真正随处收听和欣赏音乐。这所谓的“串流音乐供应”使我们能够使用智能手机和应用程序以适合我们耳朵的便携式声学方案听音乐,实现我们以前从未想过的事。

像许多电池供电的IoT应用一样,实现音频应用的一个关键要素是功耗。由于这些设备中的大多数使用蓝牙无线联接,因此完全依赖智能手机作为其“数字中枢”。为了实现直接音频串流,制造商正设法使用新的联接如几乎随处都可用的Wi-Fi直接串流音频到设备。尽管几乎可以肯定在“ 5G时代”设备对直接公共联接的需求将得以解决,但是这要待基础设施完备,可取代通过蓝牙联接“随处”使用便携式声学方案的便利性,还需时日。

安森美半导体的LC823455专为这一未来而设计,可控制功耗并支持Wi-Fi联接。该SoC集成用于实现高分辨率音频质量的先进音频数字信号处理(DSP),采用32位LPDSP32处理器。该器件还提供专为处理音乐数据而设计的内置处理算法。

LC823455框图

为了满足Wi-Fi内存远远大于采用蓝牙的内存需求,LC823455提供了令人可观的4 MB 静态随机存储器(SRAM)。通过基于Arm®Cortex®-M3处理器的双核系统以及独立播放功能可将功耗降至最低,从而有助于延长电池使用寿命。此功能还支持听众下载其喜欢的歌曲并存储在外部存储器中。

想象一下便携式声学方案的自由度。您将能享受所需的音频串流服务并随意走动,而不必一直待在手机旁。

您可以拿起杂志、追猫、倾听音乐,而无需将手机放在口袋里。如果您担心电池电量不足,但又想继续听音乐,可关闭无线模式并继续以音乐播放模式聆听。

对于所有音乐爱好者来说,这难道不是梦想成真吗?

要了解有关LC823455和音频最新趋势的更多信息,请观看我们2019年技术研讨会上的音频/语音用户接口会议。

标签:Consumer, Portable and Wireless, IoT
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