TWI815161B - Control method, system, and electronic equipment - Google Patents

Abstract

A control method, system and electronic equipment comprise the receiving module, the instruction code module and the communication module. A control method for playing audio signal comprises the following steps: receiving an audio signal playing order, obtaining an order code according to the audio signal playing order, and transferring the order code to an audio equipment. The audio equipment preloads an audio signal package and an order code set. The audio signal package comprises a plurality of audio signals. The order code set comprises a mapping relation set of the audio signals to the corresponding order code. The audio equipment searches and plays the preloaded audio signal according to the received order code. The control method saves the time of the data compression and decompression in the traditional Bluetooth broadcasting by preloading the audio signal package in the audio equipment. Therefore, the audio delay of the audio equipment would be minimized to achieve no loss for playing the audio signal, and the user's experience can be improved.

Description

Audio playback control method, system and electronic device

The present invention relates to the field of the Internet, specifically, to an audio playback control method, system and electronic equipment.

The mobile game market is expanding year by year. With the epidemic impacting the global economy, development has shown growth against the trend. However, Bluetooth headsets equipped with mobile games today commonly have problems such as sound delay, which seriously affects the game user experience. .

Sound sources for Bluetooth wireless transmission (such as mobile phones) transmit signals through the Bluetooth Audio Broadcasting Model Protocol (Advanced Audio Distribution Profile, A2DP). The bit rate of the signal transmission is very limited and cannot completely transmit the sound signal like wired transmission. Passed to the headset, therefore, the music signal must be transmitted through encoding and compression. After the Bluetooth receiving end (headphone) receives the signal, it will decompress the Bluetooth signal, convert it into digital audio, and finally output it to the digital-to-analog converter on the device. (DAC).

Generally speaking, the human ear cannot effectively identify the difference in sound delay within 70ms. When the delay exceeds 150ms, the human ear can easily identify the sound delay. The measured delay data of most Bluetooth audio systems on the market is about 200ms to between 300ms.

At present, the technical solutions to solve Bluetooth delayed transmission mainly include:

Audio-visual synchronization technology means that when the transmitter (mobile phone) and the receiver (headphones) play a video, they will check the playback time with each other and wait for the audio delay through the screen to ensure that the video and audio can be synchronized. The disadvantage of this technology is that it cannot Supports games, typing sounds and other events that produce sounds according to the user's movements; the transmission to the receiving end is systematically integrated to reduce latency. By systematically integrating the mobile phone chip into the Bluetooth chip, it directly reduces the delay between the transmitting end and the receiving end. Terminal audio delay processing time. The disadvantage of this technology is that the transmitter and receiver must be of the same brand. When the two are not of the same brand, there will still be sound delay problems; the delay is reduced through special Bluetooth encoding, that is, the Bluetooth audio is reduced through special Bluetooth encoding. Processing time, such as: Qualcomm's patented Bluetooth code aptX ^TM , Apple's AAC code, Sony's LDAC code. The disadvantage of this technology is that the transmitter and receiver need to support the same special Bluetooth code at the same time, and the actual measurement results are not easy Reach the theoretical value announced by the official.

It should be noted that the information disclosed in the above background section is only used to enhance understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to those of ordinary skill in the art.

In view of this, the purpose of the present invention is to provide an audio playback control method, system electronic device and storage medium. The control method eliminates the need for data in the traditional Bluetooth voice audio broadcast process by preloading audio packets in the audio playback device. The time consumed in the compression and decompression stages minimizes the sound delay on the audio playback device and achieves lossless audio playback.

Some embodiments of the present invention provide an audio playback control method, which is suitable for user terminals and includes the following steps: receiving an audio playback instruction; obtaining an audio frequency to be played according to the audio playback instruction. Instruction code; send the instruction code of the audio to be played to the audio playback device. The audio playback device is preloaded with an audio package and an instruction code set. The audio package includes multiple pieces of information. The instruction code set includes each piece of information and the corresponding instruction. A mapping relationship set of codes, and the audio playback device is configured to query the preloaded audio to be played and play it according to the received instruction code.

Some embodiments of the present invention also provide an audio playback control method, suitable for audio playback equipment, including the following steps:

Receive and store the audio packet and command code set sent by the user terminal. The audio packet includes multiple pieces of audio. The command code set includes a mapping relationship set between each message and the corresponding command code; receives the command code of the audio to be played; according to the command The code set obtains the audio to be played corresponding to the instruction code of the audio to be played; and plays the audio to be played.

Some embodiments of the present invention also provide an audio playback control system to implement the audio playback control method, including a receiving module, an instruction code module and a communication module, wherein:

The receiving module is used to receive an audio playback command; the command code module is used to obtain the command code of the audio to be played according to the audio playback command; the communication module is used to send the command code of the audio to be played to the audio playback device , the audio playback device is preloaded with an audio package and a command code set. The audio package includes multiple pieces of information. The command code set includes a mapping relationship set between each message and the corresponding command code, and the audio playback device is configured to receive the The command code queries the preloaded audio to be played and plays it.

An embodiment of the present invention also provides an electronic device, including: a processor; a memory in which executable instructions of the processor are stored; wherein the processor is configured to execute the audio playback control by executing the executable instructions. Method steps.

The audio playback control method of the present invention preloads Audio packets save the time consumed in the data compression and decompression stages in the traditional Bluetooth audio broadcast process, minimize the sound delay on the audio playback device, and achieve lossless audio playback, thus greatly improving the user's sound experience.

The audio playback control method of the present invention is suitable for fields such as games and navigation. Audio packets and audio packet code parsing rules can be formulated in games and navigation. The user terminal downloads the audio packet and the corresponding audio code instruction set and imports them in advance. Audio playback equipment, when it is necessary to play audio, the user terminal and the audio playback equipment only need to send the command code of the audio to be played instead of the compressed audio, which greatly reduces the data transmission between the user terminal and the audio playback equipment. At the same time, there is no need for the audio playback device to decompress the audio compressed package, thereby reducing the sound delay of the audio playback device.

S100~S520: steps

M100: receiving module

M200: Command code module

M300: Communication module

600: Electronic equipment

610: Processing unit

620:Storage unit

6201: RAM

6202: cache memory

6203:ROM

6204:Programs/Utilities

6205:Program module

630:Bus

640: Display unit

650:I/O interface 650

660:Network interface card

700:External device

FIG. 1 is a flow chart of an audio playback control method according to an embodiment of the present invention.

FIG. 2 is a flow chart of an audio playback control method according to another embodiment of the present invention.

FIG. 3 is a schematic structural diagram of an audio playback control system according to an embodiment of the present invention.

FIG. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

In order that the advantages, spirit and features of the present invention can be more easily and clearly understood, embodiments will be described and discussed in detail with reference to the accompanying drawings. It is worth noting that these embodiments are only representative embodiments of the present invention, and the specific methods, devices, conditions, materials, etc. exemplified therein are not intended to limit the present invention or the corresponding embodiments.

Figure 1 is a flow chart of an audio playback control method according to an embodiment of the present invention. The message playback control method is applicable to user terminals and specifically includes the following steps:

S100: Receive audio playback instructions;

S200: Obtain the command code of the audio to be played according to the audio playback command;

S300: Send the command code of the audio to be played to the audio playback device. The audio playback device is preloaded with an audio package and a command code set. The audio package includes multiple pieces of audio. The command code set includes each message and the corresponding command code. The set of mapping relationships, and the audio playback device is configured to query the preloaded audio to be played and play it according to the received instruction code.

The user terminal here can be a terminal such as a mobile phone or a computer, and the audio playback device can be a Bluetooth headset, a Bluetooth speaker, etc. The audio playback control method of the present invention preloads audio packets into the audio playback device, eliminating the most time-consuming data compression and decompression stages in the traditional Bluetooth audio broadcast process. At the same time, there is no need to send compressed audio, which greatly improves the audio playback control method. It greatly reduces the amount of data transmission between the user terminal and the audio playback device, minimizes the sound delay on the audio playback device, and achieves lossless audio playback, thus greatly improving the user's sound experience.

In this embodiment, the audio playback control method is applied to a game scene as an example for description. It is understandable that the application scenarios of the present invention are not limited to this. In other alternative implementations, the audio playback control method can also be applied to other scenarios such as navigation and music playback, which all fall within the protection scope of the present invention. within. For example, for a game, the game includes a variety of different sound effects, such as background music, character dialogue audio, prompt sounds, etc. Each piece of audio in a game can be integrated into an audio package, or a certain Each piece of information at a specific stage can be assembled into an information package. For music playback, the user can create a playlist on the user terminal, add multiple pieces of music to the playlist, and the audio of the music in the playlist can be assembled into an audio package.

The preloading of audio packets and command code sets on the audio playback device can be triggered manually. In other embodiments, it can also be automatically triggered. At this time, the audio playback control method also includes:

Receive the command to use the audio playback device; for example, the command to use the audio playback device here can be automatically triggered when the game is started, that is, when the user starts the game application using the user terminal, the user terminal receives the command to use the audio playback device.

Send the audio packet and command code set to the audio playback device.

In an actual scenario, for example, when the game starts, the command to use the audio playback device is automatically triggered. The command to use the audio playback device can be a command using the traditional playback mode, that is, compressing the audio to be played, transmitting the compressed audio package to be played, and playing the audio. At this time, the user terminal does not need to send the audio packet and instruction code set to the audio playback device; the command for using the audio playback device can also be the playback mode command of the present invention. Therefore, the audio playback control method of the present invention may also include the following steps:

The playback mode of the audio playback device is determined according to the instruction of the audio playback device. The available playback modes include: playing audio according to the instruction code and playing audio not according to the instruction code;

If the playback mode is not to play audio according to the command code, the user terminal does not perform subsequent steps, but controls the playback of the audio playback device according to the existing audio broadcast method. That is, when a piece of audio needs to be played, the audio designated to be played will be sent by itself. Provide audio playback equipment;

If the play mode is to play audio according to the command code of the audio to be played, the user terminal obtains the audio package and creates a command code set.

In the above steps, for example, when it is determined that the command code mode needs to be used to play audio, the user terminal performs the step of preloading the audio package and the command code set. when user When the terminal is a mobile phone or a server, the user terminal can be preloaded by first downloading the audio package through Over-The-Air (OTA) technology and creating a command code set. Here, the audio package is downloaded from the user terminal. Use the server side to download the information package. OTA over-the-air download technology is a short message-based mechanism that realizes the dynamic download, deletion and update of the business menu in the SIM card through the user terminal or server (online). The user terminal, such as a mobile phone user, only needs to perform a simple Operation, you can download the audio package provided by the technology provider through OTA air. The audio package and command code set can then be imported to the audio playback device through OTA.

Taking the audio package as the sound effect package of the game as an example, the game merchant can formulate the audio package code parsing rules while formulating the game audio package while providing the audio package. At this time, the audio package code parsing rules can be understood as each element in the audio package. The corresponding relationship between the audio segment and the command code. At this time, the user terminal can download the command code set while downloading the sound effect package. In other scenarios, the user terminal can also create a command code set based on the downloaded audio package.

Taking music playback as an example, the user can select part of the music audio to add to the playlist. The user terminal creates a mapping relationship between each audio in the playlist and the instruction code, obtains the instruction code set, and then packages the music audio in the playlist and combines it with A set of instruction codes are sent together to the music playback device.

In some embodiments, after receiving the instruction step of using the audio playback device, the audio playback control method may further include:

S210: Obtain the audio to be played corresponding to the instruction code of the audio to be played according to the instruction code set of the audio to be played;

S211: Determine whether the audio to be played has been sent to the audio playback device; the actual scenario corresponding to this step is to determine whether the audio package stored by the audio playback device includes the audio to be played. audio;

If it is not sent to the audio playback device, the audio to be played and the command code of the audio to be played are sent to the audio playback device. The audio playback device is configured to receive the audio to be played and the command code, store the mapping relationship between the two, and Save the audio to be played;

If it has been sent to the audio playback device, the command code of the audio to be played is sent to the audio playback device.

In some usage scenarios, the audio packets are relatively large and the storage space of the audio playback device is limited. In this case, the audio playback control method may also include:

Receive instructions to stop using audio playback equipment;

Send a stop play command to the audio playback device, and the audio playback device is configured to delete the audio packet and command code set in the local storage area when receiving the stop play command. Similar to triggering the command to use the audio playback device, the command to stop using the audio playback device can be triggered manually by the user or automatically. For example, in an actual scenario, the command to stop the audio playback device is automatically triggered when the game is closed. The above steps can instantly clear the storage space of the audio playback device to facilitate the next audio playback, and also reduce the storage space requirements of this function on the audio playback device itself.

In this embodiment, the instruction code at least includes information required for mapping to the audio to be played, such as the number of the audio to be played. In each audio packet, the number of each audio to be played is unique, that is, in the audio packet, one audio to be played can be uniquely determined according to the instruction code.

Further, in an alternative implementation, the instruction code may also include processing parameters for the audio to be played. The processing parameters may include but are not limited to whether to perform noise reduction processing. management, volume, whether to play at double speed, etc. The processing parameters may be obtained by parsing the game provider's audio package code parsing rules. That is, the game provider's audio package code parsing rules may stipulate specific requirements for playing specific audio. By sending the processing parameters to the audio playback device, the game sound effects can be optimally restored. The processing parameters can also be manually set by the user in the user terminal. For example, for some audio with a relatively high volume, the volume in the processing parameters can be preset to be lowered. For audio in the dialogue part of the character, the processing parameters can be preset. Noise reduction processing, etc. are needed to achieve a better playback experience. The audio playback device is configured to play the audio to be played according to the processing parameters, such as performing noise reduction processing on the audio to be played during playback to achieve better sound quality, or adjusting the volume according to the processing parameters.

Some embodiments of the present invention also provide an audio playback control method, suitable for audio playback equipment, including the following steps:

Receive and store the audio packet and command code set sent by the user terminal. The audio packet includes multiple pieces of information, and the command code set includes a mapping relationship set between each message and the corresponding command code;

S410: Receive the command code of the audio to be played;

S510: Obtain the audio to be played corresponding to the instruction code of the audio to be played according to the instruction code set;

Play the audio to be played.

Generally, the audio playback control method applicable to the audio playback device is adapted to the audio playback control method applicable to the user terminal. FIG. 2 is a flow chart of an audio playback control method according to another embodiment of the present invention. When it is determined that the audio to be played is not sent to the audio playback device, the user terminal sends the audio to be played and the command code of the audio to be played to the audio playback device. To prepare, perform the following steps:

S320: The audio playback device receives the audio to be played and the command code of the audio to be played;

S420: The audio playback device stores the audio to be played and the command code of the audio to be played;

S520: The audio playback device obtains the audio to be played corresponding to the instruction code of the audio to be played according to the instruction code set.

In this embodiment, the instruction code at least includes information required for mapping to the audio to be played, for example, the number of the audio to be played. In each audio packet, the number of each audio to be played is unique, that is, in the audio packet, one audio to be played can be uniquely determined according to the instruction code.

It should be pointed out that the instruction code may not only include the mapped information required for the audio to be played, but may also include processing parameters for the audio to be played. The processing parameters may include but are not limited to whether to perform noise reduction processing, volume, whether to play at double speed, etc. The processing parameters may be obtained by parsing the game provider's audio package code parsing rules. That is, the game provider's audio package code parsing rules may stipulate specific requirements for playing specific audio. By sending the processing parameters to the audio playback device, the game sound effects can be optimally restored. The processing parameters can also be manually set by the user in the user terminal. For example, for some audio with a relatively high volume, the volume in the processing parameters can be preset to be lowered. For audio in the dialogue part of the character, the processing parameters can be preset. Noise reduction processing, etc. are needed to achieve a better playback experience. At this time, playing the audio to be played includes: the audio playing device plays the audio to be played according to the processing parameters, such as performing noise reduction processing on the audio to be played during playback to achieve better sound quality, or according to Process parameters for volume adjustment, etc.

As mentioned above, since the storage space of the audio playback device is limited, accordingly, the audio playback control method suitable for the audio playback device may also include:

Receive a stop play instruction; the stop play instruction may be sent by the user terminal;

Delete the message package and the command code set.

The above steps can realize real-time clearing of the storage space of the audio playback device, providing convenience for the next audio playback, and also reducing the requirement of this function on the storage space of the audio playback device itself.

Some embodiments of the present invention also provide an audio playback control system to implement the audio playback control method suitable for user terminals.

Figure 3 is a schematic structural diagram of an audio playback control system according to an embodiment of the present invention. The audio playback control system includes a receiving module M100, an instruction code module M200 and a communication module M300, where:

The receiving module M100 is used to receive audio playback instructions;

The command code module M200 is used to obtain the command code of the audio to be played according to the audio playback command;

The communication module M300 is used to send the command code of the audio to be played to the audio playback device. The audio playback device is preloaded with an audio packet and a command code set. The audio packet includes multiple pieces of audio. The command code set includes each piece of audio. and the corresponding command code mapping relationship set, and the audio playback device is configured to query the preloaded audio to be played and play it according to the received command code.

The functions of each functional module in the audio playback control system of the embodiment can be implemented using the specific implementation of each step in the audio playback control method. For example, the receiving module M100, the instruction code module M200, and the communication module M300 can implement their functions using the specific implementation of the above-mentioned steps S100 to S300, which will not be described again here. The audio playback control system of the present invention reduces the amount of data transmission between the user terminal and the audio playback device and eliminates the data compression and decompression stages in the traditional transmission process between the two. The sound delay is reduced to a minimum to achieve lossless audio playback, thereby greatly improving the user's sound experience.

An electronic device 600 according to this embodiment of the invention is described below with reference to FIG. 4 . The electronic device 600 shown in FIG. 4 is only an embodiment and should not impose any restrictions on the functions and scope of use of the embodiments of the present invention.

As shown in Figure 4, electronic device 600 is embodied in the form of a general computing device. The components of the electronic device 600 may include, but are not limited to: at least one processing unit 610, at least one storage unit 620, a bus 630 connecting different platform components (including the storage unit 620 and the processing unit 610), a display unit 640, and the like.

Wherein, the storage unit stores program code, and the program code can be executed by the processing unit 610, so that the processing unit 610 performs the steps according to various exemplary embodiments of the present invention described in the above method part of this specification. For example, processing unit 610 may perform steps as shown in FIG. 1 .

The storage unit 620 may include a readable medium in the form of a volatile storage unit, such as a random access storage unit (RAM) 6201 and/or a cache storage unit 6202, and may further include a read-only storage unit (ROM) 6203.

Storage unit 620 may also include a program/utility 6204 having a set (at least one) of program modules 6205 including, but not limited to: an operating system, one or more applications, other program modules, and Programming information, each or some combination of these embodiments may include implementation of a network environment.

Bus 630 may represent one or more of several types of bus structures, including a storage unit bus or storage unit controller, a peripheral bus, a graphics acceleration port, a processing unit, or using any of a variety of bus structures. local bus.

Electronic device 600 may also communicate with one or more external devices 700 (e.g., keyboard, pointing device, Bluetooth device, etc.), may also communicate with one or more devices that enable a user to interact with electronic device 600, and/or Communicate with any device (eg, router, modem, etc.) that enables the electronic device 600 to communicate with one or more other computing devices. This communication may occur through input/output (I/O) interface 650. Moreover, the electronic device 600 can also communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN) and/or a public network, such as the Internet) through the network interface card 660. The network interface card 660 can communicate with other modules of the electronic device 600 through the bus 630 . It should be understood that, although not shown in the figure, other hardware and/or software modules may be used in conjunction with the electronic device 600, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives and data backup storage platforms, etc.

To sum up, the present invention provides an audio playback control method and system electronic equipment. The audio playback control method is suitable for user terminals and includes the following steps: receiving an audio playback instruction; and obtaining an instruction for audio to be played according to the audio playback instruction. Code; send the command code of the audio to be played to the audio playback device, which is preloaded with the audio package and Instruction code set, the audio package includes multiple pieces of audio, the instruction code set includes a mapping relationship set between each message and the corresponding instruction code, and the audio playback device is configured to query the preloaded audio to be played based on the received instruction code and Play. The control method of the present invention saves the time consumed in the data compression and decompression stages in the traditional Bluetooth audio broadcast process by preloading audio packets into the audio playback device; at the same time, it greatly reduces the time required between the user terminal and the audio playback device. The amount of data transmitted minimizes the sound delay on the audio playback device, achieving lossless audio playback, thereby greatly improving the user's sound experience.

Through the above detailed description of the preferred embodiments, it is hoped that the characteristics and spirit of the present invention can be more clearly described, but the scope of the present invention is not limited by the above disclosed preferred embodiments. On the contrary, the intention is to cover various modifications and equivalent arrangements within the scope of the patent for which the present invention is intended. Therefore, the scope of the patentable scope of the present invention should be interpreted in the broadest manner according to the above description, so as to cover all possible changes and equivalent arrangements.

S100, S200, S300: steps

Claims (10)

An audio playback control method, applied to a user terminal, includes the following steps: receiving an audio playback instruction; obtaining an instruction code of an audio to be played according to the audio playback instruction; and sending the instruction code of the audio to be played. To an audio playback device, the audio playback device preloads an audio packet and an instruction code set, wherein the audio packet includes a plurality of audios to be played, and the instruction code set includes each of the plurality of audios to be played. and the corresponding instruction code mapping relationship set, and the audio playback device is configured to query and play the audio to be played corresponding to the instruction code among the plurality of preloaded audios to be played according to the received instruction code. The audio playback control method described in item 1 of the patent application scope further includes the following steps before sending the command code of the audio to be played to the audio playback device: receiving an instruction to use the audio playback device; and according to The use audio playback device instruction sends the audio packet and the command code set to the audio playback device for preloading by the audio playback device. The audio playback control method described in item 2 of the patent application further includes the following steps after receiving the instruction to use the audio playback device: determining a playback mode of the audio playback device according to the instruction to use the audio playback device; and If the playback mode is to play audio according to the command code of the audio to be played, the user terminal obtains the audio packet and creates the command code set, and sends the audio packet and the command code set to the audio playback device, to be preloaded by the audio playback device. The audio playback control method described in item 1 of the patent application scope further includes the following steps after obtaining the command code of the audio to be played according to the audio playback command: according to the multiple audios to be played and the corresponding multiple audios. The command code set of the audio to be played Obtain the audio to be played corresponding to the instruction code; and, in the step of sending the instruction code of the audio to be played to the audio playback device, further include the following steps: determine whether the audio to be played has been sent to the audio player device; if not sent to the audio playback device, the audio to be played and the instruction code of the audio to be played are sent to the audio playback device for the audio playback device to store the audio to be played; and if sent to The audio playback device sends the command code of the audio to be played to the audio playback device. The audio playback control method described in item 1 of the patent application scope further includes the following steps: receiving an instruction to stop using the audio playback equipment; sending a stop playback instruction to the audio playback equipment according to the instruction to stop using the audio playback equipment. The playback device is configured to delete the audio packet and the command code set when receiving the stop playback command. An audio playback control method, applied to an audio playback device, includes the following steps: receiving and storing an audio packet and an instruction code set sent by a user terminal. The audio packet includes a plurality of audio to be played, and the instruction code set A mapping relationship set including each audio to be played and a corresponding instruction code in the plurality of audios to be played; receiving an instruction code for an audio to be played; and extracting data from the plurality of audios to be played according to the instruction code and the instruction code set. Obtain the audio to be played corresponding to the command code; and play the audio to be played. For the audio playback control method described in item 6 of the patent application, the instruction code also includes a processing parameter for the audio to be played; and the step of playing the audio to be played includes: Play the audio to be played according to the processing parameter. The audio playback control method described in item 6 of the patent application further includes the following steps: receiving a stop playback command; and deleting the audio packet and the command code set according to the stop playback command. An audio playback control system applied to a user terminal and used to implement the audio playback control method of any one of items 1 to 5 of the patent application scope. The audio playback control system includes a receiving module and an instruction code module. and a communication module, wherein: the receiving module is used to receive the audio playback command; the command code module is used to obtain the command code of the audio to be played according to the audio playback command; and the communication module is used to The instruction code of the audio to be played is sent to the audio playback device. The audio playback device is preloaded with the audio package and the instruction code set. The audio package includes multiple audios to be played. The instruction code set includes the multiple A set of mapping relationships between each audio to be played and the corresponding instruction code in the audio to be played, and the audio playback device is configured to query the preloaded plurality of audio to be played corresponding to the instruction code based on the received instruction code. The audio should be played and played. An electronic device, characterized by comprising: a processor; and a memory in which an executable instruction of the processor is stored; wherein the processor is configured to execute the first step of the patent scope by executing the executable instruction. Steps for the audio playback control method of any one of items 1 to 5.

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