CN102376308A - Device and method for processing pulse-code modulation (PCM) digital signals - Google Patents

Abstract

The invention discloses a device and a method for processing PCM digital signals. The method is implemented by the device for processing the PCM digital signals. The method for processing the PCM digital signals comprises that: when a PCM digital signal is transmitted to a Bluetooth from an audio codec, a central processor reads the PCM digital signal from the audio codec to a first buffer region; the central processor processes the PCM digital signal in the first buffer region; the central processor transmits the processed PCM digital signal to the Bluetooth; when the PCM digital signal is transmitted to the audio codec from the Bluetooth, the central processor reads the PCM digital signal from the Bluetooth to a second buffer region; the central processor processes the PCM digital signal in the second buffer region; and the central processor transmits the processed PCM digital signal to the audio codec.

Description

Processing apparatus and method PCM digital signals

TECHNICAL FIELD

[0001] The present invention relates to a signal processing method, and particularly relates to apparatus and method for processing a PCM digital signal.

【Background technique】

[0002] Currently, treatment PCM (Pulse Code Modulation) PCM digital signal requires a separate hardware module inside or PCM audio codec comprises a module, this relative increase in design cost. Since the hardware module and PCM audio codec, transmission between Bluetooth is an analog signal, interference is poor, the signal tends to be distorted. PCM sampling rate of the digital signal, a gain or the like by the PCM processing hardware module, so that PCM digital signal processing hardware flexibility than using software at

Reasonable way to have a certain gap.

[SUMMARY]

[0003] The main object of the present invention to provide a relatively low-cost, good anti-jamming device and method for processing flexible and PCM digital signal processing.

[0004] To achieve the above object, an apparatus for processing a digital PCM signal of the invention, the apparatus comprises an audio codec, a central processor, a Bluetooth, and a central processor connected to the audio codec, the said central processor is connected to the Bluetooth. Transmit PCM digital audio signal from the codec to Bluetooth, the central processor reads the PCM digital signal from the audio codec to the first buffer, the central processor of a digital PCM signal of the first buffer is processed, the central processor PCM digital signal processing is transmitted to the Bluetooth. The central processor reads the PCM digital signals from the PCM digital signal to the Bluetooth transmission when the audio codec to the second buffer from the Bluetooth, the central processor of the second buffer PCM digital signal processing, the central processing unit transmit PCM digital signal processing to the audio codec.

[0005] Another object of the present invention to provide a method for processing a PCM digital signal, the method is implemented by a PCM digital signal processing apparatus, the PCM digital signal processing method comprising:

[0006] transmitting digital signals from the PCM audio codec when the Bluetooth,

[0007] Step (100), the central processor reads the PCM digital signal from the audio codec to a first buffer;

[0008] Step (101), the central processor of a digital PCM signal of the first buffer is processed;

[0009] Step (102), the central processor PCM digital signal processing is transmitted to the Bluetooth;

[0010] audio codec to said PCM digital signals from Bluetooth transmission,

[0011] Step 000), the central processor reads the PCM digital signals in a second buffer from the Bluetooth;

[0012] Step (201), the central processor of the PCM digital signal for processing the second buffer;

[0013] Step (20¾, the central processor PCM digital signal processing to the audio codec.

[0014] Compared with the prior art, apparatus and method for processing a PCM digital signal processor according to the present invention utilizes a central processing PCM digital signal, and thereby eliminating the need for hardware module PCM cost savings, since the central processor and the Bluetooth , PCM digital signals are transmitted between the audio codec, and therefore has better immunity. Further, by a central PCM digital signal processor software, a more flexible process to achieve the purpose of the PCM digital signal. BRIEF DESCRIPTION

[0015] FIG. 1 is a block diagram of the processing apparatus PCM digital signal.

[0016] FIG. 2 is a PCM digital signals transmitted from the audio codec flowchart PCM digital signal processing method for Bluetooth.

[0017] FIG. 3 is a flowchart of a method of a digital signal to the PCM codec processes audio PCM digital signals transmitted from the Bluetooth.

【Detailed ways】

[0018] Please refer to FIG. 1 to FIG. 3, an apparatus for processing a digital PCM signal of the invention, the apparatus includes an audio codec 11, the central processor 12, Bluetooth 13, the central processor 12 and the audio codec 11 is connected to the central processor 12 is connected to the 13 Bluetooth. 11 transmits the digital signal from the PCM audio codec 13 to the Bluetooth, the central processor 12 from the audio codec 11 reads PCM digital signal to the first buffer 121, the CPU 12 of the first buffer 121 PCM digital signal processing, the PCM digital signal is transmitted to the central processor 12 to process 13 Bluetooth. 13 from a Bluetooth transmission signal to PCM digital audio codec 11, the CPU 12 reads the Bluetooth PCM digital signal 13 from 122, the central processor 12 of the second PCM digital signals in the second buffer 122 buffer processing, PCM digital signal is transmitted to the central processor 12 to process the audio codec 11.

[0019] Another object of the present invention to provide a method for processing a PCM digital signal, the method is implemented by a PCM digital signal processing apparatus, the PCM digital signal processing method comprising:

[0020] The PCM 11 transmits a digital signal from the audio codec 13 to the Bluetooth,

[0021] Step 100, the CPU 12 reads from the audio codec 11 PCM digital signal to the first buffer 121;

[0022] Step 101, the central PCM digital signal processor 12 for processing the first buffer 121;

[0023] Step 102, the digital PCM 12 transmits the processed signals to the central processor 13 Bluetooth;

[0024] Bluetooth transmission from the 13 PCM digital signal to the audio codec 11,

[0025] Step 200, the CPU 12 reads the PCM digital signals in a second buffer from the Bluetooth 122 13;

[0026] Step 201, the central processor 12 of the second buffer 122 PCM digital signal for processing;

[0027] Step 202, the transmit PCM digital signal to the CPU 12 to process the audio codec 11.

[0028] Since the portable automatic navigation apparatus 1 is not a voice call function, if the portable navigation device 1 automatically make voice calls, need to use PCM digital signal processing means, said signal processing means is provided in the PCM digital portable automatic navigation apparatus 1 apparatus, the PCM digital signal processing automatically connecting the portable navigation device 1, the microphone 14, and speaker 15 and a mobile phone 213 via Bluetooth wireless connections, to take advantage of the voice phone call function 2 of the call, when a voice call is performed, 1, the portable automatic navigation device 14 sends an audio signal to the microphone audio codec 11, the audio codec 11 audio PCM signal obtained by coding a digital signal, the CPU 12 reads from the audio codec 11 take PCM digital signal written in the first buffer 121 and the central PCM digital signal processor 12 for processing the first buffer 121, the PCM digital signal after the central processor 12 to the Bluetooth transmission processing 13, the Bluetooth is a digital PCM 13 receives the processed signals transmitted to the mobile phone 2 in the form of a radio signal. Similarly, the audio signal is transmitted to the cell phone 2 Bluetooth 13, 122 of the CPU 12, the CPU 12 the PCM digital signal from the second buffer 122 is processed Bluetooth PCM 13 reads the digital signal from the second buffer , transmit PCM digital signal to the CPU 12 to process the audio codec 11, the audio codec 11 after the decoded audio signal is automatically sent to the portable navigation device 1, a speaker 15.

[0029] The audio codec 11 and the Bluetooth PCM sample rate and the bit rate of the digital signals 13 are not the same, so that the transmission rates of the two different PCM digital signal, in order to ensure that data is not lost, the audio codec 11 and PCM digital data signal transmitted to another Bluetooth 13 stored in the first buffer 121 and second buffer 122. In the two PCM digital signals stored in the buffer store or a single linked circular list structure may be employed. The buffer zone is further characterized by two data temporarily storing said PCM digital signal, so that the central processor 12 may process the digital signal data PCM of the two buffer adjusted PCM digital signal, sample rate, gain and so on. Because the system is portable automatic navigation apparatus 1 provides the Windows CE PCM digital signal adjustment program, said program comprising adjusting PCM digital signal sample rate, gain, etc. of the program, so that the central processor 12 can process the software instructions PCM digital signal and enhance the flexibility of PCM digital signal processing.

[0030] Such a treatment method is not limited to a PCM digital signal to PCM digital signals between 13 and audio codec 11 to process Bluetooth, can also be processed PCM digital signals between the player and Bluetooth.

[0031] A method and apparatus for processing a PCM digital signal, the present invention utilizes a central processor 12 processes the PCM digital signal, and thereby eliminating the need for hardware module PCM cost savings, since the central processor 12 and a Bluetooth 13, an audio codec 11 is transmitted between the digital PCM signal is thus better immunity. Further, the PCM digital signal processing through the CPU 12 with the software, to achieve the purpose of the process is more flexible PCM digital signal.

Claims (4)

A PCM digital signal processing apparatus, wherein the apparatus comprises: an audio codec; central processor, the central processor and the audio codec is connected; Bluetooth, the Bluetooth and the said central processor is connected, transmit PCM digital audio signal from the codec to Bluetooth, the central processor reads the PCM digital signal from the audio codec to the first buffer, the first central processor PCM buffer when processing a digital signal, a central processor PCM digital signal processing is transmitted to the Bluetooth, the Bluetooth transmission from the PCM digital signal to the audio codec, the central processor reads the digital signal from the second Bluetooth PCM buffer, central PCM digital signal processor for processing the second buffer, the central processor PCM digital signal processing to the audio codec.

2. A method of processing a digital PCM signal, the PCM method is implemented by a digital signal processing apparatus, characterized in that the processing method of the digital PCM signal comprises: transmitting a signal from said PCM digital audio codec to Bluetooth when, in step (100), the central processor reads the PCM digital signal from the audio codec in a first buffer; step (101), the central processor of a digital PCM signal of the first buffer is processed; step ( 10¾, the central processor PCM digital signal processing is transmitted to the Bluetooth; transmitting from said PCM digital signals to the Bluetooth audio codec, the step (200), the central processor reads the PCM digital signal to the first Bluetooth two buffer step (201), the central processor of a digital PCM signal of the second processing buffer; step (20¾, the central processor PCM digital signal processing to the audio codec.

The PCM digital signal processing apparatus according to claim 1, wherein said central processor to the first buffer, the second buffer of the PCM digital signal processing comprises a digital signal processing PCM sampling rate, gain.

The PCM digital signal processing apparatus according to claim 1, wherein said processing means is provided in the PCM digital signals PND device, the PCM digital signal processing apparatus and the PND the device microphone, a speaker connected.