CN105681819A - Method, device and system for sending and receiving signal - Google Patents
Method, device and system for sending and receiving signal Download PDFInfo
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Abstract
The invention discloses a method and a device for sending and receiving a signal. The method for sending the signal comprises the steps of dividing to-be-sent audio data or a control command used for configuration of an audio transmission process into N binary code streams in a first preset bit length, wherein N is an integer greater than 0; coding the N binary code streams in the first preset bit length into N binary code streams in the second preset bit length according to a preset rule, wherein the second preset bit length is greater than the first preset bit length; setting a data frame starting sign SOFA or a control frame starting sign SOFC at the starting position of at least one binary code stream in the second preset bit length and generating M data frames or M control frames, wherein the SOFA corresponds to the audio data, and the SOFC corresponds to the control command; and outputting the M data frames or the M control frames through a single-line output interface. Through the method for sending the signal, the problem that multiple signal lines are required for transmission of the audio data and the control command is solved.
Description
Technical field
The present invention relates to the communications field, specifically, it relates to the sending, receiving method of a kind of signal and device, system.
Background technology
Along with the development of technology, sound signal is in the transmission of device interior and equipment room, and more and more employs method for digitizing, to avoid noise that analog signal transmission introduces and distortion. Conventional digital audio format comprises PCM (PulseCodeModulation, pulse code modulation), I2S (Inter-ICSound, chip chamber audio frequency interface) and SPDIF (Sony/PhilipsDigitalInterfaceFormat, Sony/Philip numeral interface) etc.
PCM and I2S is very proven technique, simple and reliable, is widely used in the audio interconnect of device interior. But these two kinds of interfaces have common defect: first is that unidirectional audio frequency needs 3 signal wire transmission, and two-way audio frequency needs 4 signal wire transmission, slightly dislikes loaded down with trivial details; 2nd is that the interface of both sides must carry out clock, bit wide and time gap configuration after could normal operation, and these configuration orders must by other control interface such as I2C (Inter-IntegratedCircuit, inter-chip interconnects interface) or SPI (SerialPeripheralInterface, Serial Peripheral Interface (SPI)) etc. interface go realize, this must cause the further increase of wiring quantity, simplification and the low-cost design being unfavorable for circuit, is also unfavorable for the miniaturization of equipment.
SPDIF is also proven technique, and the sound signal of its transfer of unidirectional only needs individual signals line, and the interconnection simplified between audio-frequency apparatus is highly beneficial. But, SPDIF also has very obvious defect: the first, SPDIF protocol comparison is complicated, causes the circuit of communication both sides and software cost higher; Two, SPDIF does not support that the signal more than 2 sound channels directly transmits, it is necessary to could indirectly be realized by the compression of complexity coding, increases software expense further, strengthens treater burden and increase power consumption. Due to above-mentioned, current SPDIF is only for equipment room interface, and such as, interconnection between independent player and independent power amplifier, generally need not in the interconnection of device interior.
Summary of the invention
The present invention provides sending, receiving method and device, the system of a kind of signal, needs the problem by many signal wire transmission at least to solve correlation technique sound intermediate frequency data and control command.
According to an aspect of the present invention, provide the sending method of a kind of signal, comprise: the binary code stream that audio frequency data to be sent or the control command that is used for audio frequency transmitting procedure being configured are divided into N number of first predetermined bit length, N be greater than 0 integer; The binary code stream that the binary code stream of described N number of first predetermined bit length is encoded to according to preset rules N number of 2nd predetermined bit length, described 2nd predetermined bit length is greater than described first predetermined bit length; The zero position setting data frame initial mark SOFA or control frame initial mark SOFC of the binary code stream of the 2nd predetermined bit length described at least one, generate M data frame or M control frame, wherein, described SOFA is corresponding to described audio frequency data, described SOFC is corresponding to described control command, and M is not more than N; By single line, described M data frame or M control frame are exported interface export.
Preferably, described first predetermined bit length is 4 bits, and described 2nd predetermined bit length is 5 bits, the described binary code stream by described N number of first predetermined bit length is encoded to the binary code stream of N number of 2nd predetermined bit length according to preset rules, comprise: the binary code stream that the binary code stream of described N number of first predetermined bit length is extended to described N number of 2nd predetermined bit length, wherein, 1 and 0 is comprised in the binary code stream of described 2nd predetermined bit length, and do not comprise continuous print three 1 in the binary code stream of described 2nd predetermined bit length, and, if first of the binary code stream of described 2nd predetermined bit length is 1, then the 2nd of the binary code stream of described 2nd predetermined bit length is 0, if last position of the binary code stream of described 2nd predetermined bit length is 1, then the penultimate of the binary code stream of described 2nd predetermined bit length is 0.
Preferably, it is 0 that described SOFA and described SOFC is the first bit position, and includes the bit stream of continuous print three 1.
According to another aspect of the present invention, provide a kind of reception method of signal, comprise: received M data frame or M control frame by single line input interface, each binary code stream comprising at least one the 2nd predetermined bit length of described M data frame or described M control frame, and it is arranged on the data frame initial mark SOFA or control frame initial mark SOFC of the zero position of the binary code stream of described 2nd predetermined bit length, wherein, described SOFA is corresponding to described data frame, and described SOFC is corresponding to described control frame; The binary code stream that described M data frame or described M control frame are decoded as according to preset rules N number of first predetermined bit length, described 2nd predetermined bit length is greater than described first predetermined bit length, N be greater than 0 integer, M is not more than N.
Preferably, it is 0 that described SOFA and SOFC is the first bit position, and includes the bit stream of continuous print three 1.
Preferably, described first predetermined bit length is 4 bits, and described 2nd predetermined bit length is 5 bits, the described binary code stream that described M data frame or described M control frame are decoded as according to preset rules N number of first predetermined bit length, comprise: be the binary code stream of described N number of first predetermined bit length by described M data frame or described M control frame decoding, wherein, 1 and 0 is comprised in the binary code stream of described 2nd predetermined bit length, and do not comprise continuous print three 1 in the binary code stream of described 2nd predetermined bit length, if and first of the binary code stream of described 2nd predetermined bit length is 1, then the 2nd of the binary code stream of described 2nd predetermined bit length is 0, if and last position of the binary code stream of described 2nd predetermined bit length is 1, then the penultimate of the binary code stream of described 2nd predetermined bit length is 0.
According to a further aspect in the invention, provide a kind of sending spparatus, comprise: data packet units, for audio frequency data to be sent or the control command that is used for audio frequency transmitting procedure being configured being divided into the binary code stream of N number of first predetermined bit length, N be greater than 0 integer; Coding unit, for the binary code stream of described N number of first predetermined bit length is encoded to the binary code stream of N number of 2nd predetermined bit length according to preset rules, described 2nd predetermined bit length is greater than described first predetermined bit length; The zero position setting data frame initial mark SOFA or control frame initial mark SOFC of the binary code stream of the 2nd predetermined bit length described at least one, generate M data frame or M control frame, wherein, described SOFA is corresponding to described audio frequency data, described SOFC is corresponding to described control command, and M is not more than N; Output unit, exports for described M data frame or M control frame are exported interface by single line.
Preferably, described coding unit, for the binary code stream of described N number of first predetermined bit length being extended to the binary code stream of described N number of 2nd predetermined bit length, wherein, 1 and 0 is comprised in the binary code stream of described 2nd predetermined bit length, and do not comprise continuous print three 1 in the binary code stream of described 2nd predetermined bit length, if and first of the binary code stream of described 2nd predetermined bit length is 1, then the 2nd of the binary code stream of described 2nd predetermined bit length is 0, if and last position of the binary code stream of described 2nd predetermined bit length is 1, then the penultimate of the binary code stream of described 2nd predetermined bit length is 0, it is 0 that described SOFA and described SOFC is the first bit position, and includes the bit stream of continuous print three 1.
According to a further aspect in the invention, provide a kind of receiving trap, comprise: receive unit, for being received M data frame or M control frame by single line input interface, each binary code stream comprising at least one the 2nd predetermined bit length of described M data frame or described M control frame, and it is arranged on the data frame initial mark SOFA or control frame initial mark SOFC of the zero position of the binary code stream of described 2nd predetermined bit length, wherein, described SOFA is corresponding to described data frame, described SOFC is corresponding to described control frame, N be greater than 0 integer, M is not more than N, decoding unit, for described M data frame or described M are controlled the binary code stream that frame is decoded as N number of first predetermined bit length according to preset rules, described 2nd predetermined bit length is greater than described first predetermined bit length.
Preferably, described decoding unit, for by described M data frame or described M control frame decoding being the binary code stream of described N number of first predetermined bit length, wherein, 1 and 0 is comprised in the binary code stream of described 2nd predetermined bit length, and do not comprise continuous print three 1 in the binary code stream of described 2nd predetermined bit length, if and first of the binary code stream of described 2nd predetermined bit length is 1, then the 2nd of the binary code stream of described 2nd predetermined bit length is 0, if and last position of the binary code stream of described 2nd predetermined bit length is 1, then the penultimate of the binary code stream of described 2nd predetermined bit length is 0.
According to another aspect of the present invention, provide a kind of mutual system of signal, comprise: treater, for audio frequency data to be sent or the control command that is used for audio frequency transmitting procedure being configured being divided into the binary code stream of N number of first predetermined bit length, N be greater than 0 integer;The binary code stream that the binary code stream of described N number of first predetermined bit length is encoded to according to preset rules N number of 2nd predetermined bit length, described 2nd predetermined bit length is greater than described first predetermined bit length; The zero position setting data frame initial mark SOFA or control frame initial mark SOFC of the binary code stream of the 2nd predetermined bit length described at least one, generate M data frame or M control frame, wherein, described SOFA is corresponding to described audio frequency data, described SOFC is corresponding to described control command, and M is not more than N; Described M data frame or M control frame are exported interface by single line and transfers to audio decoder device;
Described audio decoder device, for receiving described M data frame or described M control frame by single line input interface; Described M data frame or described M control frame are decoded as according to preset rules the binary code stream of described N number of first predetermined bit length.
Pass through the present invention, adopt and audio frequency data to be sent or control command are encoded according to preset rules, and the zero position initial mark of setting data frame of binary code stream in encoded or the control initial mark of frame, and then export, by single line, the technical scheme that interface carries out transmitting. Solve correlation technique sound intermediate frequency data and control command and need the problem by many signal wires transmission, and then reach the effect of circuit reduction, device miniaturization.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the part of the application, and the schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention. In the accompanying drawings:
Fig. 1 is the sending method schematic flow sheet of signal according to embodiments of the present invention;
Fig. 2 is the reception method schematic flow sheet of signal according to embodiments of the present invention;
Fig. 3 is the structural representation of sending spparatus according to embodiments of the present invention;
Fig. 4 is the structural representation of receiving trap according to embodiments of the present invention;
Fig. 5 is the structural representation of the mutual system of signal according to embodiments of the present invention;
Fig. 6 is basic circuit diagram according to embodiments of the present invention;
Fig. 7 is the hardware logic diagram of sending side according to embodiments of the present invention;
Fig. 8 is the hardware logic diagram of receiver side according to embodiments of the present invention;
Fig. 9 is workflow schematic diagram according to embodiments of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing and come the present invention is described in detail in conjunction with the embodiments. It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification sheets, or understand by implementing the present invention. The object of the present invention and other advantages realize by structure specifically noted in the specification sheets write, claim book and accompanying drawing and obtain.
It should be noted that, " first " " 2nd " in the embodiment of the present invention is only for distinguishing, and is not used in the restriction to order or priority.
Embodiments providing the sending method of a kind of signal, as shown in Figure 1, the method comprises the following steps:
S102, the binary code stream that audio frequency data to be sent or the control command that is used for audio frequency transmitting procedure being configured are divided into N number of first predetermined bit length, N be greater than 0 integer;
S104, the binary code stream that the binary code stream of N number of first predetermined bit length is encoded to according to preset rules N number of 2nd predetermined bit length, the 2nd predetermined bit length is greater than the first predetermined bit length;
S106, at least one the 2nd predetermined bit length binary code stream zero position setting data frame initial mark SOFA or control frame initial mark SOFC, generating M data frame or M control frame, wherein, SOFA is corresponding to audio frequency data, SOFC is corresponding to control command, and M is not more than N;
S108, by M data frame or M control frame by single line export interface export.
Wherein, the binary code stream of each the 2nd predetermined bit length does not all comprise SOFA (STARTOFFRAME-AUDIO, the initial mark of data frame) or SOFC (STARTOFFRAME-COMMAND, the control initial mark of frame), namely the coded system of the binary code stream of the 2nd predetermined bit length is not identical with SOFA or SOFC, and then ensure that the uniqueness of SOFA and SOFC, SOFA and SOFC is detected by simple circuit easy to use. Wherein, the bit stream of multiple 2nd preset length can corresponding SOFA or SOFC.
In the embodiment of the present invention, owing to have employed, audio frequency data to be sent or control command are encoded according to preset rules, and the zero position initial mark of setting data frame of binary code stream in encoded or the control initial mark of frame, thus realize the technical scheme that exports interface and carry out transmitting by single line. Therefore, it is possible to solution audio frequency data and control command need the problem by many signal wires transmission, and then reach the effect of circuit reduction, device miniaturization.
Preferably, the binary code stream of N number of first predetermined bit length is encoded to according to preset rules the binary code stream of N number of 2nd predetermined bit length, comprise: the binary code stream that the binary code stream of N number of first predetermined bit length is extended to N number of 2nd predetermined bit length, wherein, 1 and 0 is comprised in the binary code stream of the 2nd predetermined bit length, and do not comprise continuous print three 1 in the binary code stream of the 2nd predetermined bit length, if and first of the binary code stream of the 2nd predetermined bit length is 1, then the 2nd of the binary code stream of the 2nd predetermined bit length is 0, if and last position of the binary code stream of the 2nd predetermined bit length is 1, then the penultimate of the binary code stream of the 2nd predetermined bit length is 0. according to such encoding scheme, no matter arbitrarily combine in any order, all there will not be the 1 of continuous print 3 or more.
Preferably, it is 0 that SOFA and SOFC is the first bit position, and includes the bit stream of continuous print three 1. And then ensure that the uniqueness of SOFA and SOFC, SOFA and SOFC is detected by simple circuit easy to use.
Preferably, by single line output interface, M data frame or M control frame are transferred to audio decoder device to comprise: M data frame or M control frame are converted to serial frame, and by single line, serial frame are exported interface and transfers to audio decoder device. And then form serial frame according to predetermined form, single root signal wire transmits.
Preferably, the first predetermined bit length is 4 bits, and the 2nd predetermined bit length is 5 bits.
The embodiment of the present invention additionally provides a kind of reception method of signal, and as shown in Figure 2, the method comprises the following steps:
S202, received M data frame or M by single line input interface and control frame, each binary code stream comprising at least one the 2nd predetermined bit length of M data frame or M control frame, and it is arranged on the data frame initial mark SOFA or control frame initial mark SOFC of the zero position of the binary code stream of the 2nd predetermined bit length, wherein, SOFA is corresponding to data frame, and SOFC is corresponding to control frame;
S204, the binary code stream that M data frame or M control frame are decoded as according to preset rules N number of first predetermined bit length, the 2nd predetermined bit length be greater than the first predetermined bit length N be greater than 0 integer, M is not more than N.
Preferably, M data frame or M are controlled the binary code stream that frame is decoded as N number of first predetermined bit length according to preset rules, comprise: M data frame or M are controlled the binary code stream that frame decoding is N number of first predetermined bit length, wherein, 1 and 0 is comprised in the binary code stream of the 2nd predetermined bit length, and do not comprise continuous print three 1 in the binary code stream of the 2nd predetermined bit length, if and first of the binary code stream of the 2nd predetermined bit length is 1, then the 2nd of the binary code stream of the 2nd predetermined bit length is 0, if and last position of the binary code stream of the 2nd predetermined bit length is 1, then the penultimate of the binary code stream of the 2nd predetermined bit length is 0.
Preferably, it is 0 that SOFA and SOFC is the first bit position, and includes the bit stream of continuous print three 1.
Preferably, the first predetermined bit length is 4 bits, and the 2nd predetermined bit length is 5 bits.
The embodiment of the present invention additionally provides a kind of sending spparatus, and as shown in Figure 3, this device comprises:
Data packet units 302, for audio frequency data to be sent or the control command that is used for audio frequency transmitting procedure being configured being divided into the binary code stream of N number of first predetermined bit length, N be greater than 0 integer;
Coding unit 304, for the binary code stream of N number of first predetermined bit length is encoded to the binary code stream of N number of 2nd predetermined bit length according to preset rules, the 2nd predetermined bit length is greater than the first predetermined bit length; At the zero position setting data frame initial mark SOFA or control frame initial mark SOFC of the binary code stream of at least one the 2nd predetermined bit length, generate M data frame or M control frame, wherein, SOFA is corresponding to audio frequency data, and SOFC is corresponding to control command;
Output unit 306, transfers to audio decoder device for M data frame or M control frame are exported interface by single line.
Preferably, coding unit 304, for the binary code stream of N number of first predetermined bit length being extended to the binary code stream of N number of 2nd predetermined bit length, wherein, 1 and 0 is comprised in the binary code stream of the 2nd predetermined bit length, and do not comprise continuous print three 1 in the binary code stream of the 2nd predetermined bit length, if and first of the binary code stream of the 2nd predetermined bit length is 1, then the 2nd of the binary code stream of the 2nd predetermined bit length is 0, if and last position of the binary code stream of the 2nd predetermined bit length is 1, then the penultimate of the binary code stream of the 2nd predetermined bit length is 0.
Preferably, it is 0 that SOFA and SOFC is the first bit position, and includes the bit stream of continuous print three 1.
Preferably, output unit 306, for exporting interface Serial output by M data frame or M control frame by single line.
The embodiment of the present invention additionally provides a kind of receiving trap, and as shown in Figure 4, this device comprises:
Receive unit 402, for being received M data frame or M control frame by single line input interface, N be greater than 0 integer, each binary code stream comprising at least one the 2nd predetermined bit length of M data frame or M control frame, and it is arranged on the data frame initial mark SOFA or control frame initial mark SOFC of the zero position of the binary code stream of the 2nd predetermined bit length, wherein, SOFA is corresponding to data frame, and SOFC is corresponding to control frame;
Decoding unit 404, is decoded as the binary code stream of N number of first predetermined bit length for M data frame or M control frame according to preset rules, and the 2nd predetermined bit length is greater than the first predetermined bit length.
Preferably, decoding unit 404, for M data frame or M are controlled the binary code stream that frame decoding is N number of first predetermined bit length, wherein, 1 and 0 is comprised in the binary code stream of the 2nd predetermined bit length, and do not comprise continuous print three 1 in the binary code stream of the 2nd predetermined bit length, if and first of the binary code stream of the 2nd predetermined bit length is 1, then the 2nd of the binary code stream of the 2nd predetermined bit length is 0, if and last position of the binary code stream of the 2nd predetermined bit length is 1, then the penultimate of the binary code stream of the 2nd predetermined bit length is 0.
The embodiment of the present invention additionally provides a kind of mutual system of signal, and as shown in Figure 5, this system comprises:
Treater 502, for audio frequency data to be sent or the control command that is used for audio frequency transmitting procedure being configured being divided into the binary code stream of N number of first predetermined bit length, N be greater than 0 integer; The binary code stream that the binary code stream of N number of first predetermined bit length is encoded to according to preset rules N number of 2nd predetermined bit length, the 2nd predetermined bit length is greater than the first predetermined bit length; At the zero position setting data frame initial mark SOFA or control frame initial mark SOFC of the binary code stream of at least one the 2nd predetermined bit length, generate M data frame or M control frame, wherein, SOFA is corresponding to audio frequency data, and SOFC is corresponding to control command; M data frame or M control frame are exported interface by single line and transfers to audio decoder device 504;
Audio decoder device 504, for receiving M data frame or M control frame by single line input interface; M data frame or M are controlled the binary code stream that frame is decoded as N number of first predetermined bit length according to preset rules.
Pass through the present invention, adopt and audio frequency data to be sent or control command are encoded according to preset rules, and the zero position initial mark of setting data frame of binary code stream in encoded or the control initial mark of frame, and then export, by single line, the technical scheme that interface carries out transmitting. Solve correlation technique sound intermediate frequency data and control command and need the problem by many signal wires transmission, and then reach the effect of circuit reduction, device miniaturization.
The present invention provides a kind of novel audio signal interface, single root signal wire can be used to transmit unidirectional sound signal, support multichannel transmits, bit wide and variable sample rate, and configuration information (being equivalent to above-mentioned control command) directly can be sent by this signal wire, it is not necessary to independent configuration interface. This coded system is simple more than SPDIF, logical circuit and the software expense of interface are low, can be widely used in the audio interconnect of device interior, substitute the audio signal wires such as original and PCM and I2S, and cancel the control signal lines such as original I2C or SPI, significantly simplify circuit. This interface adopts following technique means to realize:
For control command and audio frequency data, all press the frame of predetermined form composition serial, single root signal wire transmits.
Between frame and frame, being distinguished by the initial mark (SOF, STARTOFFRAME) of specific frame, this SOF is a string binary code stream, and only for the beginning of mark one frame, other parts in frame inside do not occur.SOF can have multiple (SOFA and SOFB as escribed above), for frame being divided into different kinds, frame such as can be divided into audio frequency frame and order frame (being equivalent to above-mentioned control frame) two classes, it is respectively used to transmission tone audio data and control command.
In order to transmit clock information, and avoid that SOF occur in audio frequency data and control command, it is necessary to select suitable SOF, and audio frequency data and control command to be encoded before transmission. A kind of preferred encoding scheme is: first, by audio frequency data and control command, be divided into the scale-of-two group of multiple 4 bit length; Secondly, this scale-of-two group is expanded to 5 bits, and this 5 bit meets three following condition: A) must comprise in coding 1 and 0, B) continuous print 31, C do not occur) be positioned at continuous 1 from beginning to end and can only have 1; Finally, it may also be useful to 5 bit stream comprising continuous 31 are as SOF.
Data after coding, are attached after SOF, form a frame, modulated by unipolarity non-return-to-zero or other baseband modulation methods, are sent on single root signal wire and transmit.
Interface signal circuit has the frame length of acquiescence, voice-grade channel number and word width. After system starts, the form communication of communication both sides to give tacit consent to. In working process, both sides are through consultation, it is possible to change frame length degree, voice-grade channel number and word width.
As shown in Figure 6, whole system is by treater system HOSTSYSTEM, audio decoder device AUDIOCODEC, and electro-acoustic element MIC (Microphone, microphone)/SPEAKER (Microspeaker) composition for basic circuit diagram. Wherein main treater (is equivalent to above-mentioned treater, hereinafter referred to as HOST) and AUDIOCODEC between use two unidirectional audio signal wires to connect, wherein the transmission direction of single line is that main treater is to AUDIOCODEC, as main frame to the control command transmission path of AUDIOCODEC and audio data transmission passage, the transmission direction of another single line be AUDIOCODEC (hereinafter referred to as CODEC) to main treater, receive ambient sound for transmitting reverse control command and MIC/SPEAKER.
In the present embodiment, by the sound signal of digitizing, every 4 bits carry out one extension coding, transmit after being expanded to 5 bits, and coding follows following rule:
(1) 1 and 0 must be comprised in each coding, carry clock information to guarantee;
(2) there is no three or more continuous print 1 in all codings;
(3) head and the tail continuous print 1 at most only 1 is to produce three or more continuous print 1 sending multiple coding continuously like this;
The typical encoding scheme determined according to this principle is such as table 1:
Table 1
According to such encoding scheme, no matter 5 bits after coding, arbitrarily combine in any order, all there will not be the 1 of continuous print 3 or more. According to this rule, the present embodiment specifies with the stream of bits 01110 (i.e. hexadecimal 0EH) comprising 3 continuous 1,01111 (i.e. hexadecimal 0FH) and 00111 (i.e. hexadecimal 07H) as SOF. These two stream of bits are all initial with 0, and inside all comprises continuous print 31, ensure that the uniqueness of initial frame, and SOF is detected by simple circuit easy to use.
Frame is divided into two kinds, and one is control frame, and inside comprises control command, and one is audio frequency frame, and inside comprises audio frequency data. In the present embodiment, regulation 0EH is audio frequency frame as the frame that SOF guides, with 0FH as the frame that SOF guides be control frame.Corresponding, 0EH is called audio frequency frame mark (SOFA), 0FH is called order frame mark (SOFC). In the present embodiment, default frame length is 25 bits, it may also be useful to the physical layer communication speed of 200kbps. Concrete frame format is as shown in table 2 and table 3:
Table 2 audio frame format
| …. | SOFA | Left sound channel 10 bit | Right sound channel 10 bit | …. |
| ……. | 01110 | XXXXXXXXXX | YYYYYYYYYY | ……… |
Table 3 command frame format
| ….. | SOFC | Order word 20 bit | ….. |
| ……. | 01111 | ZZZZZZZZZZZZZZZZZZZZ | ………… |
It should be noted that, the audio code stream in frame, be first just group frame after coding expansion, although it is 10 bits that left and right acoustic channels looks, but only carry 8 bits have effective information. Order word is just sent to signal wire after also encoding according to the method described above and gets on, and order word is 16 bits before encoding, turns into 20 bits after coding in frame.
Because the regular length of each frame is 25 bits, according to the speed of 200kbps, the data of every frame send the time occupying 125us, continuously in time sending continuously, corresponding frame frequency is 8kHz. Namely the sound signal given tacit consent to is two-channel, and 8 bits quantize, the sampling rate of 8kHz.
Effective bit wide of order frame is 16 bits, and in the present embodiment, concrete order example is such as table 4, and the order not occurred in table 4 retains need not.
Table 4
In the present embodiment, the hardware logic diagram of sending side is as shown in Figure 7. First, audio frequency data and control command enter either-or switch, choose a road as required. Selected data, by being divided into the group (packet) of 4 bits again, enter encoder subsequently, and every 4 bits of encoded are expanded to 5 bits.
The data of above-mentioned 5 bit width enter an either-or switch again, this switch can 5 Bit datas after above-mentioned coding and between SOFA/SOFC, select one of them as required, and by the 5bit shift register output of clock unit control on signal wire. When needs transmit 0, output logic lower level, it is necessary to when transmitting 1, output logic high level.
In the present embodiment, the hardware logic diagram of receiver side is as shown in Figure 8. Clock unit utilizes the high low transition of input signal, extracts the phase place information of clock. Receive clock and drive 5bit stepping register, produce the binary data of 5 bit width.
5 bits of 5bit stepping register are carried out continuous detecting by SOF detecting unit, once SOFA or SOFC be detected, then export SOF/SOFA/SOFC signal. Under the control of SOF/SOFA/SOFC signal, the data of 5 bit widths are first carried out decoding and turn into 4 bits by decoding unit and data combination unit, then merge into required also row data.
SOFA and SOFC signal, also distinguishes control command input register and audio buffer, and the data after merging are passed out to command register device or audio buffer.
Below, for a complete workflow, the principle of work of the present embodiment is further illustrated. This workflow as shown in Figure 9, after main frame and CODEC (audio decoder device) power on, with the default rate communication of 200kbps. First communication form is switched to two-channel/8kHz/16bit bit wide by main frame, then the volume of CODEC is set to maximum value, and the 4kHz square wave signal (0x5050 and 0Xb050 replaced) finally exporting a two-channel is play to CODEC. Detailed step is as follows:
1) after system power-up, the speed of acquiescence is 200kbps, but bidirectional signal line is all idle, and constant is lower level, and what both sides received is full 0 signal, and both sides can't detect SOF, such as table 5 and table 6:
Table 5 output frame form
| ………. | IDLE | IDLE | IDLE | IDLE | IDLE | IDLE | …….. |
| ………. | 00000 | 00000 | 00000 | 00000 | 00000 | 00000 | ……… |
| 00H | 00H | 00H | 00H | 00H | 00H |
Table 6 inputs frame format
| ………. | IDLE | IDLE | IDLE | IDLE | IDLE | IDLE | …….. |
| ………. | 00000 | 00000 | 00000 | 00000 | 00000 | 00000 | ……… |
| 00H | 00H | 00H | 00H | 00H | 00H |
2) after resetting, software is started working, and sends a frame control command by single line interface to audio decoder device, and whether inquiry audio decoder device supports required form.The foremost of frame is initial mark (SOFC), follows CODEC inquiry order 0112H after order mark, and whether inquiry CODEC can support the form of two-channel/8kHz/16bit. Simultaneously now, audio input signal line (from CODEC to HOST direction), still keeps IDLE state, such as table 7 and table 8:
Table 7 output frame form
Table 8 inputs frame format
| ………. | IDLE | IDLE | IDLE | IDLE | IDLE | IDLE | …….. |
| ………. | 00000 | 00000 | 00000 | 00000 | 00000 | 00000 | ……… |
| 00H | 00H | 00H | 00H | 00H | 00H |
3) subsequently, CODEC sends out acknowledgement command 0212H, replies the data layout that can support 2 sound channels/8kHz/16bit to main frame. Now, HOST exports IDLE state, such as table 9 and table 10:
Table 9 output frame form
| ………. | IDLE | IDLE | IDLE | IDLE | IDLE | IDLE | …….. |
| ………. | 00000 | 00000 | 00000 | 00000 | 00000 | 00000 | ……… |
| 00H | 00H | 00H | 00H | 00H | 00H |
Table 10 inputs frame format
4) it is known that CODEC supports the form of two-channel/8kHz/16bit after main frame receives the acknowledgement command of CODEC. So sending setting command 0312H to audio decoder device, new communication pattern is set.
Table 11 output frame form
Table 12 inputs frame format
| ……… | IDLE | IDLE | IDLE | IDLE | IDLE | IDLE | …….. |
| ……… | 00000 | 00000 | 00000 | 00000 | 00000 | 00000 | ……… |
| 00H | 00H | 00H | 00H | 00H | 00H |
5), after main frame sends mentioned order, immediately the frame format of output is switched to, such as table 13 and table 14:
Table 13 audio frame format
| ……. | Frame is initial | Left sound channel 20 bit | Right sound channel 20 bit | ……. |
| 01110 | XXXXXXXX | YYYYYYYY |
Table 14 command frame format
| Frame is initial | Order word 20 bit | Idle 20 bits | ….. | |
| ….. | 01111 | ZZZZZZZZ | ………. | … |
Owing to new frame length is 45 bits, frame rate is constant is still 8k, and the communication rate modification of physical layer is 45*8k=360kbps.
Receiving circuit, after receiving communication form renewal order, is also configured to above-mentioned frame format and communicates in speed by CODEC immediately.
6) main frame sends out configuration order by new frame format to audio decoder device, volume is set to maximum, and corresponding setting command is 047FH. Because new frame length is elongated, order the length not taken, export IDLE. Now, audio input signal line, still keeps IDLE state, such as table 15 and table 16:
Table 15 output frame form
Table 16 inputs frame format
| ………. | IDLE | IDLE | IDLE | IDLE | IDLE | IDLE | …….. |
| ………. | 00000 | 00000 | 00000 | 00000 | 00000 | 00000 | ……… |
| 00H | 00H | 00H | 00H | 00H | 00H |
7) after CODEC receives and is correctly decoded volume setting command, being set to maximum by the volume of self output, and send response information 04FFH to HOST, now HOST is in waiting status, and output signal keeps idle state, such as table 17 and table 18:
Table 17 output frame form
| …… | IDLE | IDLE | IDLE | IDLE | IDLE | IDLE | …….. |
| …… | 00000 | 00000 | 00000 | 00000 | 00000 | 00000 | ……… |
| 00H | 00H | 00H | 00H | 00H | 00H |
Table 18 inputs frame format
8) after receiving, at HOST, the response information coming from CODEC, starting to send audio frequency data to audio decoder device, now audio input signal line is in idle state. The audio frequency data that HOST exports are 5050H and A050H of circulation, and each data sends twice, represents left sound channel and right sound channel respectively, such as table 19 and table 20:
Table 19 output frame form
Table 20 inputs frame format
| ………. | IDLE | IDLE | IDLE | IDLE | IDLE | IDLE | …….. |
| ………. | 00000 | 00000 | 00000 | 00000 | 00000 | 00000 | ……… |
9), after CODEC receives 5050H and A050H of above-mentioned circulation, through ADC (Analog-to-DigitalConverter, A/D converter) and power amplifier, this square wave is exported to SPEAKER, sends alarm call.
In another embodiment, additionally providing a kind of software, this software is for performing in above-described embodiment and preferred implementation the technical scheme described.
In another embodiment, additionally providing a kind of storage media, store above-mentioned software in this storage media, this storage media includes but not limited to: CD, floppy disk, hard disk, scratch pad memory etc.
Obviously, the technician of this area should be understood that, each module of above-mentioned the present invention or each step can realize with general calculating device, they can concentrate on single calculating device, or it is distributed on network that multiple calculating device forms, can selection of land, they can realize with the program code that calculating device can perform, thus, they can be stored and perform by calculating device in the storage device, and in some cases, can to be different from the step shown or described by the execution of order herein, or they are made into respectively each integrated circuit modules, or the multiple module in them or step are made into single integrated circuit module realize.Like this, the present invention does not limit and combines in any specific hardware and software.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations. Within the spirit and principles in the present invention all, any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the sending method of a signal, it is characterised in that, comprising:
The binary code stream that audio frequency data to be sent or the control command that is used for audio frequency transmitting procedure being configured are divided into N number of first predetermined bit length, N be greater than 0 integer;
The binary code stream that the binary code stream of described N number of first predetermined bit length is encoded to according to preset rules N number of 2nd predetermined bit length, described 2nd predetermined bit length is greater than described first predetermined bit length;
The zero position setting data frame initial mark SOFA or control frame initial mark SOFC of the binary code stream of the 2nd predetermined bit length described at least one, generate M data frame or M control frame, wherein, described SOFA is corresponding to described audio frequency data, described SOFC is corresponding to described control command, and M is not more than N;
By single line, described M data frame or M control frame are exported interface export.
2. the sending method of signal according to claim 1, it is characterised in that, described first predetermined bit length is 4 bits, and described 2nd predetermined bit length is 5 bits; The described binary code stream by described N number of first predetermined bit length is encoded to the binary code stream of N number of 2nd predetermined bit length according to preset rules, comprising:
The binary code stream of described N number of first predetermined bit length is extended to the binary code stream of described N number of 2nd predetermined bit length, wherein, 1 and 0 is comprised in the binary code stream of described 2nd predetermined bit length, continuous print three 1 are not comprised in the binary code stream of described 2nd predetermined bit length, and, if first of the binary code stream of described 2nd predetermined bit length is 1, then the 2nd of the binary code stream of described 2nd predetermined bit length is 0; If last position of the binary code stream of described 2nd predetermined bit length is 1, then the penultimate of the binary code stream of described 2nd predetermined bit length is 0.
3. the sending method of signal according to claim 2, it is characterised in that, it is 0 that described SOFA and described SOFC is the first bit position, and includes the bit stream of continuous print three 1.
4. the reception method of a signal, it is characterised in that, comprising:
M data frame or M control frame is received by single line input interface, each binary code stream comprising at least one the 2nd predetermined bit length of described M data frame or described M control frame, and it is arranged on the data frame initial mark SOFA or control frame initial mark SOFC of the zero position of the binary code stream of described 2nd predetermined bit length, wherein, described SOFA is corresponding to described data frame, and described SOFC is corresponding to described control frame;
The binary code stream that described M data frame or described M control frame are decoded as according to preset rules N number of first predetermined bit length, described 2nd predetermined bit length is greater than described first predetermined bit length, N be greater than 0 integer, M is not more than N.
5. the reception method of signal according to claim 4, it is characterised in that, it is 0 that described SOFA and SOFC is the first bit position, and includes the bit stream of continuous print three 1.
6. the reception method of signal according to claim 5, it is characterised in that, described first predetermined bit length is 4 bits, and described 2nd predetermined bit length is 5 bits; The described binary code stream that described M data frame or described M control frame are decoded as N number of first predetermined bit length according to preset rules, comprising:
By the binary code stream that described M data frame or described M control frame decoding are described N number of first predetermined bit length, wherein, 1 and 0 is comprised in the binary code stream of described 2nd predetermined bit length, and do not comprise continuous print three 1 in the binary code stream of described 2nd predetermined bit length, if and first of the binary code stream of described 2nd predetermined bit length is 1, then the 2nd of the binary code stream of described 2nd predetermined bit length is 0, if and last position of the binary code stream of described 2nd predetermined bit length is 1, then the penultimate of the binary code stream of described 2nd predetermined bit length is 0.
7. a sending spparatus, it is characterised in that, comprising:
Data packet units, for audio frequency data to be sent or the control command that is used for audio frequency transmitting procedure being configured being divided into the binary code stream of N number of first predetermined bit length, N be greater than 0 integer;
Coding unit, for the binary code stream of described N number of first predetermined bit length is encoded to the binary code stream of N number of 2nd predetermined bit length according to preset rules, described 2nd predetermined bit length is greater than described first predetermined bit length; The zero position setting data frame initial mark SOFA or control frame initial mark SOFC of the binary code stream of the 2nd predetermined bit length described at least one, generate M data frame or M control frame, wherein, described SOFA is corresponding to described audio frequency data, described SOFC is corresponding to described control command, and M is not more than N;
Output unit, exports for described M data frame or M control frame are exported interface by single line.
8. sending spparatus according to claim 7, it is characterised in that,
Described coding unit, for the binary code stream of described N number of first predetermined bit length being extended to the binary code stream of described N number of 2nd predetermined bit length, wherein, 1 and 0 is comprised in the binary code stream of described 2nd predetermined bit length, and do not comprise continuous print three 1 in the binary code stream of described 2nd predetermined bit length, if and first of the binary code stream of described 2nd predetermined bit length is 1, then the 2nd of the binary code stream of described 2nd predetermined bit length is 0, if and last position of the binary code stream of described 2nd predetermined bit length is 1, then the penultimate of the binary code stream of described 2nd predetermined bit length is 0, it is 0 that described SOFA and described SOFC is the first bit position, and includes the bit stream of continuous print three 1.
9. a receiving trap, it is characterised in that, comprising:
Receive unit, for being received M data frame or M control frame by single line input interface, each binary code stream comprising at least one the 2nd predetermined bit length of described M data frame or described M control frame, and it is arranged on the data frame initial mark SOFA or control frame initial mark SOFC of the zero position of the binary code stream of described 2nd predetermined bit length, wherein, described SOFA is corresponding to described data frame, described SOFC is corresponding to described control frame, N be greater than 0 integer, M is not more than N;
Decoding unit, for described M data frame or described M are controlled the binary code stream that frame is decoded as N number of first predetermined bit length according to preset rules, described 2nd predetermined bit length is greater than described first predetermined bit length.
10. receiving trap according to claim 9, it is characterised in that,
Described decoding unit, for by described M data frame or described M control frame decoding being the binary code stream of described N number of first predetermined bit length, wherein, 1 and 0 is comprised in the binary code stream of described 2nd predetermined bit length, and do not comprise continuous print three 1 in the binary code stream of described 2nd predetermined bit length, if and first of the binary code stream of described 2nd predetermined bit length is 1, then the 2nd of the binary code stream of described 2nd predetermined bit length is 0, if and last position of the binary code stream of described 2nd predetermined bit length is 1, then the penultimate of the binary code stream of described 2nd predetermined bit length is 0.
11. 1 kinds of mutual systems of signal, it is characterised in that, comprising:
Treater, for audio frequency data to be sent or the control command that is used for audio frequency transmitting procedure being configured being divided into the binary code stream of N number of first predetermined bit length, N be greater than 0 integer; The binary code stream that the binary code stream of described N number of first predetermined bit length is encoded to according to preset rules N number of 2nd predetermined bit length, described 2nd predetermined bit length is greater than described first predetermined bit length; The zero position setting data frame initial mark SOFA or control frame initial mark SOFC of the binary code stream of the 2nd predetermined bit length described at least one, generate M data frame or M control frame, wherein, described SOFA is corresponding to described audio frequency data, described SOFC is corresponding to described control command, and M is not more than N; Described M data frame or M control frame are exported interface by single line and transfers to audio decoder device;
Described audio decoder device, for receiving described M data frame or described M control frame by single line input interface; Described M data frame or described M control frame are decoded as according to preset rules the binary code stream of described N number of first predetermined bit length.
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| CN110312146A (en) * | 2019-06-06 | 2019-10-08 | 百度在线网络技术（北京）有限公司 | Audio-frequency processing method, device, electronic equipment and storage medium |
| CN113204507A (en) * | 2021-04-25 | 2021-08-03 | 山东英信计算机技术有限公司 | Universal input/output data transmission method, device, equipment and medium |
| WO2021208683A1 (en) * | 2020-04-16 | 2021-10-21 | 华为技术有限公司 | Control signal sending method, control signal receiving method, and related device |
| WO2024001138A1 (en) * | 2022-06-30 | 2024-01-04 | 哲库科技(上海)有限公司 | Apparatus and method for transmitting audio data, and electronic device |
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