CN2531448Y - Radio PDA audio-frequency device - Google Patents
Radio PDA audio-frequency device Download PDFInfo
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- CN2531448Y CN2531448Y CN 01274730 CN01274730U CN2531448Y CN 2531448 Y CN2531448 Y CN 2531448Y CN 01274730 CN01274730 CN 01274730 CN 01274730 U CN01274730 U CN 01274730U CN 2531448 Y CN2531448 Y CN 2531448Y
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Abstract
The utility model discloses a wireless audio device consisting of a microprocessor, a multimedia digital signal codec, a microphone, a power amplifier module and an audio playing device, a wireless communication module, a first and a second audio-mixing circuits and a switching circuit. An audio output of the wireless communication module is connected with an A/D input end of the multimedia digital signal codec, wherein the audio output of the wireless communication module and a digital-to-analog conversion output of the multimedia digital signal codec are respectively connected with the input end of the first audio-mixing circuit whose output is connected with the power amplifier module. The digital-to-analog conversion output of the multimedia digital signal codec which also goes through the switching circuit and the audio signal of the microphone are respectively connected with the input end of the second audio-mixing circuit, wherein the output of the second is connected with the audio input end of the wireless communication module. The utility model makes full use of the powerful operation processing capability of PDA, and organically combines the audio and wireless audio of PDA without increasing single machine cost.
Description
Technical Field：
The utility model relates to a wireless PDA audio device, in particular to an audio device which realizes multiple audio processing functions on the PDA with wireless access function.
Background：
At present, more and more mobile phones have functions of personal information management, including recording, telephone recording, and the like; meanwhile, more and more Personal Digital Assistants (PDAs) are used, for example: the palm computer has added the wireless access module, if: a General Packet Radio Service (GPRS) module, a Global system for Mobile Communications (GSM) module, and a Code Division Multiple Access (CDMA) module, etc., which provide wireless communication functions. The PDA itself has the audio processing functions of recording, playing MP3 and the like. After the wireless access function is added, it is an object of continuous efforts in the industry to make full use of the powerful computing processing capability of the PDA, and to organically combine the PDA voice and the wireless voice without increasing the cost of a single device, and to provide more functions than the sum of the single functions. However, products that have been successful in combining PDAs and cellular phones to date have far from the goal of organically combining the PDA's voice with wireless voice.
Referring to fig. 1, the conventional audio apparatus with a PDA having a wireless access function includes: the device comprises a Microprocessor (MCU), a multimedia digital signal coder-decoder (CODEC), a Microphone (MIC), a power amplifier module and an audio playing device (SPK), wherein the MCU is connected with a digital signal interface of the multimedia digital signal coder-decoder (CODEC) and used for inputting or outputting a digital audio signal from the multimedia digital signal coder-decoder (CODEC) to the multimedia digital signal coder-decoder (CODEC); an analog-to-digital conversion (A/D) input end of a multimedia digital signal coder-decoder (CODEC) is connected with an audio output signal of a Microphone (MIC), a digital-to-analog conversion (D/A) output end of the multimedia digital signal coder-decoder (CODEC) is connected to an input audio signal end of a power amplification module, and an output end of the power amplification module is connected to an audio playing device (SPK).
To meet the market demand, an audio device with a PDA having a wireless access function should generally have the following functions: playing MP3, making voice call, and can be set by the user: simultaneously playing MP3 during the conversation process, allowing the other party to hear or not letting the other party hear; meanwhile, the system also has the functions of automatic answering, telephone message leaving, voice call recording, live voice recording and the like. Obviously, the existing PDA audio circuit can only realize the functions of recording and playing audio files; the audio circuit of the PDA does not meet the above requirements after adding a wireless access module.
Disclosure of Invention：
The main object of the present invention is to provide a wireless PDA audio device, which makes full use of the powerful operation processing capability of the PDA after increasing the wireless access function, and organically combines the voice of the PDA with the wireless voice without increasing the cost of the single device.
The utility model aims at realizing through the following technical scheme:
a wireless PDA audio device provided with: the device comprises a Microprocessor (MCU), a multimedia digital signal coder-decoder (CODEC), a Microphone (MIC), a power amplifier module and an audio playing device (SPK), wherein the MCU is connected with a digital signal of the multimedia digital signal coder-decoder (CODEC) and is used for inputting or outputting a digital audio signal from the multimedia digital signal coder-decoder (CODEC) to the multimedia digital signal coder-decoder (CODEC); the input end of an analog-to-digital conversion (A/D1) of a multimedia digital signal coder-decoder (CODEC) is connected with the audio output signal of a Microphone (MIC), the output end of the digital-to-analog conversion (D/A) of the multimedia digital signal coder-decoder (CODEC) is connected to the input audio signal end of a power amplification module, and the output end of the power amplification module is connected to an audio playing device (SPK);
the wireless PDA audio device is also provided with: a wireless communication module, a first mixing circuit (C1), a second mixing circuit (C2) and a switch circuit (K1); wherein,
the audio output of the wireless communication module is connected to the other input end of analog-to-digital conversion (A/D2) of a multimedia digital signal coder-decoder (CODEC), meanwhile, the audio output of the wireless communication module and the output end of digital-to-analog conversion (D/A) of the multimedia digital signal coder-decoder (CODEC) are respectively connected to the input end of a first sound mixing circuit (C1), and the output of the first sound mixing circuit (C1) is connected to a power amplifier module;
after digital-to-analog conversion (D/A) output of a multimedia digital signal coder-decoder (CODEC) passes through a switching circuit (K1), audio signals of a Microphone (MIC) and the output of the second mixing circuit (C2) are respectively connected to the input end of a second mixing circuit (C2), and the output of the second mixing circuit (C2) is connected to the audio input end of a wireless communication module.
The wireless communication module is a GPRS module, a CDMA module or a GSM module.
The switch circuit (K1) is a switch tube or a key switch.
The utility model discloses make full use of PDA's powerful operation processing's ability, under the condition that does not increase the unit cost, organically combined PDA's pronunciation and wireless pronunciation together.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings：
Fig. 1 is a circuit diagram of a conventional PDA audio device.
Fig. 2 is a circuit diagram of the PDA audio device with wireless access function of the present invention.
Detailed Description：
Referring to fig. 2, an embodiment of the present invention is provided with: a Microprocessor (MCU) (in this embodiment, a strong arm series sa1110 chip), a multimedia digital signal CODEC (CODEC) (in this embodiment, a PHILIPS ucb1200 chip), a Microphone (MIC), a power amplifier module (in this embodiment, a U.S. national semiconductor 1m386 chip), and an audio player (SPK), wherein the Microprocessor (MCU) is connected to a digital signal of the multimedia digital signal CODEC (CODEC) to input or output a digital audio signal from or to the multimedia digital signal CODEC (CODEC); the input end of an analog-to-digital conversion (A/D1) of a multimedia digital signal coder-decoder (CODEC) is connected with the audio output signal of a Microphone (MIC), the output end of the digital-to-analog conversion (D/A) of the multimedia digital signal coder-decoder (CODEC) is connected to the input audio signal end of a power amplification module, and the output end of the power amplification module is connected to an audio playing device (SPK);
the wireless PDA audio device is also provided with: the system comprises a GPRS module, a first sound mixing circuit (C1) (adopting an F324 type operational amplifier), a second sound mixing circuit (C2) and a key switch (K1); wherein,
the audio output of the GPRS module is connected to the input end of analog-to-digital conversion (A/D2) of a multimedia digital signal coder-decoder (CODEC), meanwhile, the audio output of the GPRS module and the output end of digital-to-analog conversion (D/A) of the multimedia digital signal coder-decoder (CODEC) are respectively connected to the input end of a first sound mixing circuit (C1), and the output of the first sound mixing circuit (C1) is connected to a power amplifier module;
after digital-to-analog conversion (D/A) output of a multimedia digital signal coder-decoder (CODEC) passes through a key switch (K1), the output and an audio signal of a Microphone (MIC) are respectively connected to the input end of a second sound mixing circuit (C2), and the output of the second sound mixing circuit (C2) is connected to the audio input end of a GPRS module.
When the wireless PDA of the utility model is arranged to play the audio files stored in the Microprocessor (MCU), the GPRS module can be in a standby or off state, and the audio output signal (SPK1) of the GPRS module is not output. The digital audio signal of the audio file played by the Microprocessor (MCU) is mixed with the audio output signal (SPK1) of the GPRS module at a first sound mixing circuit (C1) through the digital-to-analog conversion (D/A) conversion of a multimedia digital signal coder-decoder (CODEC) and then is sent to the power amplification module for output. Because the GPRS module is in a standby or off state, the audio output signal (SPK1) of the GPRS module is not output, and only the sound of the audio file is played by a Microprocessor (MCU) through the power amplifier module.
When the wireless PDA of the utility model is provided with the communication, the digital-to-analog conversion (D/A) and the analog-to-digital conversion (A/D1) of the multimedia digital signal coder-decoder (CODEC) and the A/D2 are both closed, and the digital-to-analog conversion (D/A) of the multimedia digital signal coder-decoder (CODEC) is not output. The sound signal output by the Microphone (MIC) is mixed at the second mixing circuit (C2) and the digital-to-analog conversion (D/A) output of the multimedia digital signal coder-decoder (CODEC), because the digital-to-analog conversion (D/A) of the multimedia digital signal coder-decoder (CODEC) is not output at this moment, the output signal of the second mixing circuit (C2) is only the output signal of the Microphone (MIC), and the signal is sent to the audio input (MIC1) of GPRS and is sent out through the GPRS. The sound signal received by the GPRS module is output to a first sound mixing circuit (C1) through an audio output signal (SPK1) of the GPRS module, and the sound mixing circuit outputs sound mixing with digital-to-analog conversion (D/A) of a multimedia digital signal coder-decoder (CODEC), because the digital-to-analog conversion (D/A) of the multimedia digital signal coder-decoder (CODEC) is not output at the moment, the output signal of the first sound mixing circuit (C1) is only the audio output signal (SPK1) of the GPRS module, and the signal is output through a power amplification module.
When being equipped with the utility model discloses a play audio file simultaneously when wireless PDA talks, can open digital-to-analog conversion (DA) conversion of multimedia digital signal CODEC (CODEC) at the in-process of wireless conversation to Microprocessor (MCU) plays audio file simultaneously, and the output of power amplifier module is audio output signal (SPK1) of GPRS module and digital-to-analog conversion (DA) output signal of multimedia digital signal CODEC (CODEC) and locates the audio mixing in first audio mixing circuit (C1) this moment. The user can hear the sound of the audio file played by the Microprocessor (MCU) while the user is in wireless communication. And whether the calling partner hears the sound of the audio file played by the Microprocessor (MCU) can be controlled by the control switch (K1). When the switch (K1) is turned off, the output of the second mixing circuit (C2) is only the signal output by the Microphone (MIC), and the opposite party of the call cannot hear the sound of the played audio file; when the switch (K1) is closed, the output of the second mixing circuit (C2) is the output signal of the Microphone (MIC) and the mixing signal output by the digital-to-analog conversion (D/A) of the multimedia digital signal coder-decoder (CODEC), and the opposite party of the call can hear the sound of the playing audio file.
When the wireless PDA of the utility model is provided with no answer and needs automatic response, the output signal of the Microphone (MIC) can be turned off and the switch (K1) is switched on. When a call is dialed, the Microprocessor (MCU) plays a customized audio file, and the audio file is sent to the GPRS module through digital-to-analog conversion (D/A) of a multimedia digital signal coder-decoder (CODEC), a switch (K1) and a second audio mixing circuit (C2), and then is sent to the other party of the call, so that automatic response is realized.
When the wireless PDA is not used for answering and a message is needed, the voice signal of the opposite party of the call received by GPRS is output to the analog-to-digital conversion (A/D2) input end of a multimedia digital signal coder-decoder (CODEC) by an audio output signal (SPK1), the digital audio signal converted by the multimedia digital signal coder-decoder (CODEC) is received by a Microprocessor (MCU) and is stored, and the function of the message is realized.
When being equipped with the utility model discloses a wireless PDA when making a conversation the recording, all open two way analog-to-digital conversion input (AD 1), (AD 2) of multimedia digital signal CODEC (CODEC) in wireless conversation, Microprocessor (MCU) receives two way digital audio signal of this multimedia digital signal CODEC (CODEC) conversion to all save this both sides's of conversation sound, then realized the conversation recording.
When being equipped with the utility model discloses a wireless PDA carries out the on-the-spot recording, opens Microphone (MIC), and the output signal of this Microphone (MIC) exports the analog-to-digital conversion signal (AD 1) of multimedia digital signal CODEC (CODEC), and Microprocessor (MCU) receives the digital audio signal of this multimedia digital signal CODEC (CODEC) conversion to with its storage, realize the on-the-spot recording.
Finally, it should be noted that: the above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention may be modified or substituted with equivalents without departing from the spirit and scope of the invention, which should be construed as being limited only by the claims.
Claims (6)
1. A wireless PDA audio device provided with: the device comprises a Microprocessor (MCU), a multimedia digital signal coder-decoder (CODEC), a Microphone (MIC), a power amplifier module and an audio playing device (SPK), wherein the MCU is connected with a digital signal interface of the multimedia digital signal coder-decoder (CODEC) and used for inputting a digital audio signal from the multimedia digital signal coder-decoder (CODEC) or outputting the digital audio signal to the multimedia digital signal coder-decoder (CODEC); the input end of an analog-to-digital conversion (A/D1) of a multimedia digital signal coder-decoder (CODEC) is connected with the audio output signal of a Microphone (MIC), the output end of the digital-to-analog conversion (D/A) of the multimedia digital signal coder-decoder (CODEC) is connected to the input audio signal end of a power amplification module, and the output end of the power amplification module is connected to an audio playing device (SPK); the method is characterized in that:
the wireless PDA audio device is also provided with: a wireless communication module, a first mixing circuit (C1), a second mixing circuit (C2) and a switch circuit (K1); wherein,
the audio output of the wireless communication module is connected to the other input end of analog-to-digital conversion (A/D2) of a multimedia digital signal coder-decoder (CODEC), meanwhile, the audio output of the wireless communication module and the output end of digital-to-analog conversion (D/A) of the multimedia digital signal coder-decoder (CODEC) are respectively connected to the input end of a first sound mixing circuit (C1), and the output of the first sound mixing circuit (C1) is connected to a power amplifier module;
after digital-to-analog conversion (D/A) output of a multimedia digital signal coder-decoder (CODEC) passes through a switching circuit (K1), audio signals of a Microphone (MIC) and the output of the second mixing circuit (C2) are respectively connected to the input end of a second mixing circuit (C2), and the output of the second mixing circuit (C2) is connected to the audio input end of a wireless communication module.
2. The wireless PDA audio device of claim 1, wherein: the wireless communication module is a GPRS module.
3. The wireless PDA audio device of claim 1, wherein: the wireless communication module is a CDMA module.
4. The wireless PDA audio device of claim 1, wherein: the wireless communication module is a GSM module.
5. The wireless PDA audio device of claim 1, wherein: the switching circuit (K1) is a switching tube.
6. The wireless PDA audio device of claim 1, wherein: the switch circuit (K1) is a key switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01274730 CN2531448Y (en) | 2001-12-27 | 2001-12-27 | Radio PDA audio-frequency device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01274730 CN2531448Y (en) | 2001-12-27 | 2001-12-27 | Radio PDA audio-frequency device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2531448Y true CN2531448Y (en) | 2003-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01274730 Expired - Lifetime CN2531448Y (en) | 2001-12-27 | 2001-12-27 | Radio PDA audio-frequency device |
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| Country | Link |
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| CN (1) | CN2531448Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384121C (en) * | 2005-04-30 | 2008-04-23 | 何天华 | Interactive computer audio broadcasting method and system |
| CN100388181C (en) * | 2005-11-30 | 2008-05-14 | 宏碁股份有限公司 | One-hand operation system and method of handheld device |
| CN1787069B (en) * | 2005-10-21 | 2010-09-29 | 北京中星微电子有限公司 | Audio-frequency processing apparatus with voice mixing function and portable terminal |
-
2001
- 2001-12-27 CN CN 01274730 patent/CN2531448Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384121C (en) * | 2005-04-30 | 2008-04-23 | 何天华 | Interactive computer audio broadcasting method and system |
| CN1787069B (en) * | 2005-10-21 | 2010-09-29 | 北京中星微电子有限公司 | Audio-frequency processing apparatus with voice mixing function and portable terminal |
| CN100388181C (en) * | 2005-11-30 | 2008-05-14 | 宏碁股份有限公司 | One-hand operation system and method of handheld device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LIANXIANG (BEIJING) CO. LTD.; PATENTEE Free format text: FORMER OWNER: LIANXIANG (BEIJING) CO. LTD. Effective date: 20080815 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080815 Address after: No. 6, Pioneer Road, Haidian District information industry base, Beijing, 100085 Co-patentee after: Lenovo Mobile Communication Technology Ltd. Patentee after: Lenovo (Beijing) Co., Ltd. Address before: No. 6, Pioneer Road, Haidian District information industry base, Beijing, 100085 Patentee before: Lenovo (Beijing) Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20111227 Granted publication date: 20030115 |