Digital audio device
First Claim
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1. A digital audio device, comprising:
- a memory;
an analog input system configured to record analog audio signals to the memory as digital audio data;
a digital input configured to download digital audio data, through digital data transmission, to the memory;
an analog output system configured to generate analog playback signals decoded from digital audio data stored in the memory;
a digital output configured to upload digital audio data, through digital data transmission, from the memory; and
a trade connector including a contact configured to mate and cooperate with a complementarily configured and structurally identical contact on a second digital audio device having a structural configuration substantially identical to the digital audio device.
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Abstract
A digital audio device. According to one aspect of the invention, the device includes a memory and an analog input system configured to record analog audio signals to the memory as digital audio data. The device further includes a digital input configured to download digital audio data to the memory, as well as an analog output system configured to generate analog playback signals decoded from digital audio data stored in the memory. Furthermore, the device includes a digital output configured to upload digital audio data from the memory.
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Citations
24 Claims
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1. A digital audio device, comprising:
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a memory; an analog input system configured to record analog audio signals to the memory as digital audio data; a digital input configured to download digital audio data, through digital data transmission, to the memory; an analog output system configured to generate analog playback signals decoded from digital audio data stored in the memory; a digital output configured to upload digital audio data, through digital data transmission, from the memory; and a trade connector including a contact configured to mate and cooperate with a complementarily configured and structurally identical contact on a second digital audio device having a structural configuration substantially identical to the digital audio device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A portable digital audio device, comprising:
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a memory; an analog input system configured to record analog audio signal to the memory as digital audio data and associate said recorded digital audio data with a restriction code; a digital input system configured to download digital audio data, through digital data transmission, to the memory, and associate said downloaded digital audio data with a prevention code; an analog output system configured to generate analog playback signals decoded from digital audio data stored in the memory; a digital output system configured to upload digital audio data with an associated restriction code from the memory to another device through digital data transmission between the devices; and a trade connector including a contact configured to mate and cooperate with a complementarily configured and structurally identical contact on a second digital audio device having a structural configuration substantially identical to the digital audio device. - View Dependent Claims (21, 22)
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23. A portable digital audio device, comprising:
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an analog interface configured to receive analog audio signals; an analog-to-digital converter configured to convert the analog audio signals into uncompressed digital audio data; a data compressor configured to convert the uncompressed digital audio data into compressed digital audio data; a semiconductor memory configured to store compressed digital audio data; a data expander configured to convert the compressed digital audio data into expanded digital audio data; a digital-to-analog converter configured to convert the expanded digital audio data into an analog playback signal; a digital sharing system configured to share compressed digital audio data with another such portable digital audio device through digital data transmission between the devices, wherein the digital sharing system includes at least a digital input and a digital output; and a trade connector including a contact configured to mate and cooperate with a complementarily configured and structurally identical contact on a second digital audio device having a structural configuration substantially identical to the digital audio device. - View Dependent Claims (24)
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Specification