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公开(公告)号:US5406634A
公开(公告)日:1995-04-11
申请号:US33697
申请日:1993-03-16
IPC分类号: H04R27/00
CPC分类号: H04R27/00 , H04R2227/003
摘要: An intelligent speaker unit is controlled by control data transmitted with the digital audio data. The intelligent speaker has a Digital Signal Processor (DSP) for processing the audio data in accordance with the control data. The control data contains an address to select the speaker unit. The DSP for the speaker unit processes audio data digitally based on parameters in the control data. The processed digital audio data is then converted to an analog signal which is amplified and applied to the speaker. The digital audio data is time division multiplexed on a TDM bus. Each time slot on the TDM bus contains audio data for one digital audio channel. The control data is placed on the TDM bus as one channel (time slot) or is distributed as control bits through all the other channels. The control data also contains channel select data. Accordingly the DSP in a selected speaker unit may in turn select its audio data from a plurality of audio channels based on the control data the DSP receives. Further, the DSP may mix the selected audio channels by accumulating the audio data from the selected channels. Further, the control data contains audio control data for volume, speaker equalization and sound delay.
摘要翻译: 智能扬声器单元由与数字音频数据一起发送的控制数据控制。 智能扬声器具有用于根据控制数据处理音频数据的数字信号处理器(DSP)。 控制数据包含选择扬声器单元的地址。 用于扬声器单元的DSP基于控制数据中的参数以数字方式处理音频数据。 然后将经处理的数字音频数据转换成放大并应用于扬声器的模拟信号。 数字音频数据在TDM总线上进行时分复用。 TDM总线上的每个时隙都包含一个数字音频通道的音频数据。 控制数据作为一个通道(时隙)放置在TDM总线上,或者通过所有其他通道作为控制位分配。 控制数据还包含通道选择数据。 因此,所选择的扬声器单元中的DSP可以依据DSP接收的控制数据从多个音频通道中选择其音频数据。 此外,DSP可以通过累积来自所选频道的音频数据来混合所选择的音频频道。 此外,控制数据包含用于音量,扬声器均衡和声音延迟的音频控制数据。