CN102610230B - Method and device for analyzing digital audio broadcasting signals - Google Patents

Method and device for analyzing digital audio broadcasting signals Download PDF

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CN102610230B
CN102610230B CN 201110025370 CN201110025370A CN102610230B CN 102610230 B CN102610230 B CN 102610230B CN 201110025370 CN201110025370 CN 201110025370 CN 201110025370 A CN201110025370 A CN 201110025370A CN 102610230 B CN102610230 B CN 102610230B
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data
frame
digital
current
baseband
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CN102610230A (en )
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安禹坤
王立宁
王瀚
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恒生电子股份有限公司
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Abstract

本申请实施例公开了一种数字音频广播信号的解析方法和装置。 Example discloses a method and apparatus for parsing the digital audio broadcasting signal of the present application. 其中,解析方法包括:如果当前数据帧为第一帧,对当前数据帧中的所有播放频道的播放数据进行数字下变频DDC处理,得到基带数据,否则,获取当前播放频道的播放数据在当前数据帧中的位置,对当前播放频道的播放数据在当前数据帧中的位置的数据进行DDC处理,得到基带数据;对所述基带数据进行帧同步处理;对经过帧同步处理后的基带数据分别进行解调和解码处理,得到被播放的数据。 Wherein the analysis method comprising: if the current data frame is a first frame, to play data for all broadcasting channels of the current data frame frequency conversion DDC processing digital obtain baseband data, otherwise, acquiring the current data playback data of the current playing channel frame position data of the current position of the playback data of broadcasting channels in the current data frame is performed DDC processing a baseband data; the baseband data frame synchronization processing; baseband data through a frame sync separately demodulation and decoding processing to obtain playback data. 根据本申请实施例,减少音频解析处理的时间,避免出现播放节目卡顿的现象。 According to an embodiment of the present application, reducing the time audio analysis process, to avoid broadcast programs Caton phenomenon.

Description

一种数字音频广播信号的解析方法和装置 Analytical method and apparatus for a digital audio broadcasting signal

技术领域 FIELD

[0001] 本申请涉及音频处理技术领域,特别是涉及一种数字音频广播信号的解析方法和装置。 [0001] The present application relates to audio processing technology, particularly to analytical method and apparatus for a digital audio broadcasting signal.

背景技术 Background technique

[0002] 数字音频广播(Digital Audio Broadcasting, DAB)是继调幅和调频广播之后的第三代广播机制,是以数字技术为手段,由广播机构向移动、固定或便携式接收机传送高质量的声音节目和数据业务。 [0002] DAB (Digital Audio Broadcasting, DAB) is the second AM and FM radio broadcast mechanism of the third generation, in digital technology as a means to deliver high-quality voice mobile, fixed or portable receiver by a broadcasting mechanism programs and data services. ETSI 300 401标准是迄今唯一被ITU推荐的针对全球性数字音频广播系统的规范。 ETSI 300 401 standard is so far the only recommended ITU specification for the global digital audio broadcasting system.

[0003] 请参阅图1,其为现有技术中数字音频广播信号接收机的原理示意图。 [0003] Referring to FIG. 1, a schematic diagram which is a schematic prior art digital audio broadcasting signal receiver. 其中,当DAB无线信号经过天线耦合、射频模块的调谐和模数转换模块的转换成为数字中频数据后,该数字中频数据经过USB接口送入到PC机中,由PC机中的处理器完成DAB接收机的解析功能。 Wherein, when the radio signal through the DAB conversion tuner and analog to digital conversion module coupled to the antenna, the RF module into a digital IF data, the digital IF data sent via the USB interface to the PC, the PC is completed by the DAB processor analytic functions of the receiver. 数字中频数据在处理器中的解析处理基于帧处理的模式,即,当处理器内的缓冲区缓存的数字中频数据达到一帧的长度后开始解析处理。 Digital IF processor in the data analysis processing based on the processing mode frame, i.e., the analysis processing starts when the buffer cache within the processor the digital IF data reaches a length. 其中,解析处理包括:对当前帧的数字中频数据进行数字下变频(DDC)处理,得到基带数据,对基带数据进行同步,最后根据同步信息对基带数据分别进行解调、解码处理,得到待播放的音频数据。 Wherein the analysis process comprising: a digital intermediate data of the current frame frequency conversion (DDC) processing digital obtain baseband data, the baseband data synchronization, and finally demodulation based on the synchronization information of baseband data, respectively decoding processing to obtain be played the audio data. 最后由PC机中的处理器完成DAB接收机的播放功能,对解码后得到的音频数据进行播放。 Finalization of playback by the DAB receiver processor in the PC, the audio data obtained by decoding the playback.

[0004] 为了达到DAB无线信号的实时播放,必须保证处理器在完成下一帧数字中频数据的接收及缓存之前,完成当前数字中频数据帧的解析处理,这样才能实时流畅地播放节目。 [0004] In order to achieve real-time playback of DAB radio signals, the processor must be guaranteed before the completion of the next frame of the digital IF data and the reception buffer, analysis processing digital IF completion of the current data frame, in order to smoothly playback the program in real time. 但是,由于现有的接收机在对整帧的数字中频数据进行解析处理时,有时由于解析的处理时间过长,会在处理器完成下一帧数字中频数据的接收及缓存之后才完成解析处理,因此,有可能出现丢帧的情况,进而出现播放节目卡顿的现象,最终影响了音频播放的质量。 However, to complete the analysis processing at the receiver since the conventional digital IF whole frame data analysis processing is performed, since the processing time may be too long resolved, the reception will be completed and the next frame of the digital IF data cache in the processor after Therefore, it is possible to frame loss happens, then there program play Caton phenomenon, and ultimately affect the quality of the audio playback.

发明内容 SUMMARY

[0005]为了解决上述技术问题,本申请实施例提供了一种数字音频广播信号的解析方法和装置,以减少音频解析处理的时间,避免出现播放节目卡顿的现象。 [0005] To solve the above problems, the present embodiment provides an analytical method and apparatus for a digital audio broadcasting signal, in order to reduce the time for the audio analysis process, to avoid broadcast program Caton phenomenon.

[0006] 本申请实施例公开了如下技术方案: Embodiment [0006] The present application discloses an embodiment following technical solutions:

[0007] —种数字音频广播信号的解析方法,包括:如果接收机接收的当前数字中频数据帧为待解析的第一个数据帧,对当前数字中频数据帧中所有播放频道的播放数据进行数字下变频DDC处理,得到基带数据,否则,对当前数字中频数据帧中当前播放频道的播放数据进行DDC处理,得到基带数据;对所述基带数据进行帧同步和频偏同步处理,得到同步信息;根据所述同步信息对所述基带数据进行解调和解码处理,得到被播放的数据。 [0007] - Analytical Method kind digital audio broadcast signal, comprising: if the digital IF receiver for receiving current data frame is the first data frame to be resolved, the data of the current playing digital IF data frame of all digital broadcasting channels downconversion DDC processing a baseband data, otherwise, playback data in the current digital IF data frame currently broadcasting channels is DDC processing a baseband data; the baseband data frame synchronization and frequency offset synchronization, obtain synchronization information; demodulating and decoding processing according to the synchronization information of the base band data, the data obtained being played.

[0008] 一种数字音频广播信号的解析装置,包括:数字下变频处理单元,用于如果接收机接收的当前数字中频数据帧为待解析的第一个数据帧,对当前数字中频数据帧中所有播放频道的播放数据进行DDC处理,得到基带数据,否则,对当前数字中频数据帧中当前播放频道的播放数据进行DDC处理,得到基带数据;同步处理单元,用于对所述基带数据进行帧同步和频偏同步处理,得到同步信息;解调解码处理单元,用于根据所述同步信息对所述基带数据进行解调和解码处理,得到被播放的数据。 [0008] The analysis device of a digital audio broadcast signal, comprising: a digital conversion processing unit configured to, if the current digital IF receiver receives the data frame is the first frame of data to be parsed, the digital IF data to the current frame, play data for all broadcasting channels is DDC processing a baseband data, otherwise, playback data in the current digital IF data frame currently broadcasting channels is DDC processing a baseband data; synchronization processing means, for the baseband data frame frequency offset synchronization and synchronization processing, obtain the synchronization information; a decoding demodulation processing unit for demodulating and decoding processing according to the synchronization information of the base band data, the data obtained being played.

[0009] 由上述实施例可以看出,与现有技术相比,本申请具有如下优点: [0009] As can be seen from the foregoing embodiment, as compared with the prior art, the present application has the following advantages:

[0010] 在进行解析时,由于只对当前数字中频数据帧中当前播放频道的播放数据进行DDC处理,降低了DDC处理的数据帧的长度,由此提高了接收机的解析速度,进而也就保证了处理器在完成下一帧数字中频数据的接收及缓存之前,完成当前数字中频数据帧的解析处理,减少了音频解析处理的时间,实现了实时流畅地播放节目,避免出现播放节目卡顿的现象。 [0010] When parsing performed, since only the playback data for the current data frame digital IF channel is currently playing DDC process, reducing the DDC data processing frame length, thereby increasing the speed of parsing the receiver, and thus it ensure that the processor prior to completion of the next frame digital IF receiving data and cache, complete the current analysis processing digital IF data frames, reducing the time audio analysis process, to achieve smooth playback of real-time programs and avoid broadcast programs appear Caton The phenomenon. 同时,降低了接收机中处理器的CPU占有率,降低了处理器功耗。 At the same time, reducing the share of the receiver processor CPU, processor efficiency.

附图说明 BRIEF DESCRIPTION

[0011]为了更清楚地说明本申请实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。 [0011] In order to more clearly illustrate the technical solutions of the present application or in the prior art embodiments, the accompanying drawings briefly described embodiments or the prior art needed to be used in describing the embodiments, those of ordinary skill in the art to speak, without any creative effort, but also can derive from these drawings other drawings.

[0012] 图1为现有技术中数字音频广播信号接收机的原理示意图; [0012] FIG. 1 is a schematic prior art digital audio broadcasting signal receiver is a schematic diagram;

[0013] 图2为本申请一种数字音频广播信号的解析方法的一个实施例的流程图; [0013] FIG. 2 is a digital audio broadcasting analysis method to apply a signal flow diagram of the embodiment;

[0014] 图3为DAB信号的传输巾贞结构不意图; [0014] FIG. 3 is a structure of the DAB signal transmission towels Chen not intended;

[0015] 图4为不同频道的播放数据复用一帧MSC的结构示意图; [0015] Fig 4 a schematic view of the complex structure of a MSC used to playback the data of different channels;

[0016] 图5为待解析处理的数字中频数据帧的一个结构示意图; [0016] FIG. 5 is a digital intermediate frequency analyzing process to be a schematic structural diagram of a data frame;

[0017]图6为本申请一种数字音频广播信号的解析方法的具体实施流程图; [0017] FIG 6 is a flowchart of a resolution method to apply a digital audio broadcast signal;

[0018]图7为本申请一种数字音频广播信号的解析装置的一个实施例的结构图; [0018] Figure 7 is resolved to apply a digital audio broadcasting signal means is a configuration diagram of an example of embodiment;

[0019] 图8为本申请一种数字下变频处理单元的一个结构示意图; [0019] Figure 8 is a schematic view of the application of the structural unit of a digital down-conversion;

[0020] 图9为本申请一种同步处理单元的一个结构示意图; [0020] FIG. 9 is a schematic structural apply a synchronization processing unit;

[0021] 图10为本申请一种同步处理单元的另一个结构示意图; [0021] FIG. 10 is a schematic structural diagram of another application units, one synchronization processing;

[0022] 图11为本申请一种解调解码处理单元的一个结构示意图。 [0022] Figure 11 a schematic structural diagram of one kind of the present application processing unit decoding the demodulated.

具体实施方式 detailed description

[0023] 下面结合附图及实施例,对本申请实施例进行详细描述。 [0023] The following embodiments and the accompanying drawings, embodiments of the present application is described in detail. 应当理解,此处所描述的具体实施例仅用以解释本申请,并不用于限定本申请。 It should be understood that the specific embodiments described herein are merely used to explain the present application is not intended to limit the present application.

[0024] 实施例一 [0024] Example a

[0025] 请参阅图2,其为本申请一种数字音频广播信号的解析方法的一个实施例的流程图,包括以下步骤: [0025] Please refer to FIG. 2, which analytical method of the present application a digital audio broadcasting signal of a flowchart of an embodiment, comprising the steps of:

[0026] 步骤201:如果接收机接收的当前数字中频数据帧为待解析的第一个数据帧,对当前数字中频数据帧中所有播放频道的播放数据进行数字下变频DDC处理,得到基带数据,否则,对当前数字中频数据帧中当前播放频道的播放数据进行DDC处理,得到基带数据; [0026] Step 201: If the current digital IF receiver the received data frame is the first data frame to be resolved, the data of the current playing digital IF data frame conversion is performed for all broadcasting channels DDC digital processing, to obtain baseband data, otherwise, the data of the current playing digital IF data frame currently playing DDC channel is processed to obtain baseband data;

[0027] 按照ETSI 300 401标准的规定,请参阅图3,其为DAB信号的传输帧结构示意图。 [0027] in accordance with the standard ETSI 300 401, see Figure 3, which is a schematic view of a transmission frame structure of the DAB signal. 如图3所不,在发送机一侧,一个DAB信号的传输巾贞包括有若干个0FDM符号,分为同步信号、快速信息信道(FIC)和主业务信道(MSC)。 3 are not, at the transmitter side, a DAB transmission signal napkin Chen 0FDM comprises a plurality of symbols, it is divided into a synchronization signal, a Fast Information Channel (FIC) and a main service channel (MSC). 按照ETSI 300 401标准的规定,同步信道由零符号和相位基准符号(PRS)组成,作为每一帧数据的前两个符号,其作用是使接收机实现帧同步和符号同步。 In accordance with standard ETSI 300 401, a sync channel symbol and the zero phase reference symbol (PRS) composition, as the first two symbols of each frame of data, which act to move the receiver to achieve frame synchronization and symbol synchronization. 在同步信道后面是快速信息信道,主要包括DAB信号的复合结构信息(MCI)和业务信息(SI),其作用是传输控制信令信息。 Synchronization channel followed by a fast information channel, a composite structure including information (MCI) DAB signal and the service information (the SI), whose role is to transmit the control signaling information. 一帧中的绝大多数数据都承载在主业务信道中,其作用是用来传输真正的业务数据,如,被播放的音频数据。 In a vast majority of data is carried in the main service channel, which is used to transmit real action service data, e.g., audio data is played.

[0028] 同时,按照ETSI 300 401标准的规定,一帧可以承载6个不同频道的播放数据,即,一个频道的播放数据仅占用一帧中的一部分MSC。 [0028] Meanwhile, in accordance with standard ETSI 300 401, a player may carry six different channels of data, i.e., a play data channel occupies only a part of the MSC. 如图4所示,其为不同频道的播放数据复用一帧MSC的结构示意图。 4, a schematic structure of its complex with a MSC-play data to different channels.

[0029] 在发送机一侧,DAB信号的传输帧经过数模转换等处理转换为DAB无线信号后,发送机将DAB无线信号发送给接收机。 [0029] In the transmitter side, a DAB signal frame transmitted via digital to analog conversion process to convert the DAB radio signal transmitter transmits radio signals to the DAB receiver. 对应的,在接收机一侧,DAB无线信号经过天线耦合、射频模块的调谐和模数转换模块的转换成为数字中频数据后,接收机的处理器缓存数字中频数据,一旦处理器缓存的数字中频数据达到了一个帧的长度,接收机就开始对具有一个帧长度的数字中频数据帧进行解析处理。 The corresponding receiver side, DAB radio signal through conversion tuner and analog to digital conversion module coupled to the antenna, the RF module into a digital IF data, the digital IF processor cache data receiver, once the processor cache Digital IF the data length of one frame is reached, the digital IF receiver starts data frame having a frame length analysis processing.

[0030] 在现有的解析方法中,无论当前播放频道播放的数据是什么,都是对整个帧内的所有播放频道的播放数据进行DDC处理,因此,就会延长解析处理的时间。 [0030] In the conventional analysis method, regardless of the current playing channel data what is playing, all players are to play data channels within the frame DDC entire process, therefore, will extend the time-resolved process. 假设当前播放频道为图4中的频道1,如果找到频道I的播放数据在当前帧中的位置,并且只对频道I的播放数据进行DDC处理,就会缩短解析处理的时间。 Suppose the current playing channel is Channel 4 in FIG. 1, if the position of the playback data of the channel I is found in the current frame, and only the I-play data channel DDC process is performed, the analysis processing time will be shortened.

[0031] 因此,在本步骤201中,如果当前数字中频数据帧不是待解析的第一数据帧,只对当前数字中频数据帧中当前播放频道的播放数据进行DDC处理。 [0031] Accordingly, in the present step 201, if the current frame of the first digital IF data is not data to be parsed frame, only the data of the current playing digital IF data frame currently playing DDC channel is processed.

[0032] 其中,可以由当前播放频道的播放数据在当前数字中频数据帧中的时隙起始位置反映其在当前数字中频数据帧中的位置。 [0032] wherein, may reflect its current position in the digital IF data frame in the time slot starting position of the digital IF data in the current frame by the player currently playing the data channel. 贝U, Tony U,

[0033] 对当前数字中频数据帧中当前播放频道的播放数据进行DDC处理包括:根据上一个数字中频数据帧中的零符号位置和搜台时获得的当前播放频道的播放数据在一个基带数据帧中占用的时隙的起始位置,确定当前播放频道的播放数据在当前数字中频数据帧中占用的时隙的起始位置;对确定的时隙的起始位置上的数据进行DDC处理。 [0033] The playback data in the current digital IF data frame currently broadcasting channels is DDC process comprising: data in a base band according to the play data obtained when the null symbol on a digital IF data frame position and the search station is currently playing channel frame starting position of time slot occupied, to determine the starting position of the currently playing player data channel occupancy in the current digital IF data frame slot; start position of data on the time slot determination process is performed DDC.

[0034] 例如,按照ETSI 300 401标准的规定,每一个频道的播放数据在任何一个基带数据帧中占用的时隙起始位置是固定的,如,频道I的播放数据在一个基带数据帧中占用的时隙起始位置为3-10,频道2的播放数据在一个数据帧中占用的时隙起始位置为40-50。 [0034] For example, in accordance with ETSI 300 401 standard-play data of each channel is occupied at any one baseband data frame slot starting position is fixed, e.g., channel I play data in a baseband data frame starting position of time slot occupied 3-10, 2 play data channel occupied time slots in a data frame start position 40-50. 在搜台时可以获得当前播放频道的播放数据在一个基带数据帧中占用的时隙的起始位置。 You can obtain the current play data playback start position occupied channels in a baseband data frame at the time slot search table.

[0035] 在接收机一侧,当DAB无线信号经过天线耦合、射频模块的调谐和模数转换模块的转换成为数字中频数据后,接收机的处理器先缓存数字中频数据,并且只要处理器缓存的数字中频数据达到了一个帧的长度,接收机就开始对具有一个帧长度的数字中频数据帧进行解析处理。 [0035] At the receiver side, when the DAB radio signal through an antenna coupler conversion, the RF tuning module and analog to digital conversion module into a digital IF data, the receiver IF processor, the first digital data cache, and where the processor cache digital IF data length of one frame is reached, the digital IF receiver starts data frame having a frame length analysis processing. 此时,在接收机解析处理的数字中频数据帧中,零符号位置并不一定位于该帧的第一个位置,如图5所示,其为待解析处理的数字中频数据帧的一个结构示意图,其中,零符号位置有可能位于待解析的数字中频数据帧中的中间某一个位置。 At this time, a structure diagram, the digital IF receiver of the data frame analysis processing, the null symbol position is not necessarily located at the first position of the frame, shown in Figure 5, which is a digital intermediate frequency analysis processing to be a data frame intermediate, wherein the null symbol position is likely to be located in the parsed digital IF data frame to a place. 为了确定当前数字中频数据帧中当前播放频道的播放数据的位置,可以在搜台时获得的当前播放频道的播放数据在一个基带数据帧中占用的时隙的起始位置,由于当前播放频道的播放数据在一个基带数据帧中占用的时隙的起始位置与当前播放频道的播放数据在一个数字中频数据帧中占用的时隙的起始位置具有一定的对应关系,根据该对应关系进而也就可以获得当前播放频道的播放数据在一个数字中频数据帧中占用的时隙的起始位置,此时获得的当前播放频道的播放数据在一个数字中频数据帧中占用的时隙的起始位置是以零符号在数据帧中的第一个时隙为起点计算的,而实际上,在当前数字中频数据帧中零符号不一定在数据帧中的第一个时隙,有可能存在如图5所示的时隙偏移,而上一个数字中频数据帧中的零符号位置与当前数字中频数据帧中的零符 In order to determine the current position of the digital IF data playback data frame of the channel currently playing, playback starting position of the current play data channel may be obtained when searching a table occupies the baseband data frame time slots, since the current playing channel playback start position data of the start position of the playback data occupies a baseband data frame time slots currently occupied broadcasting channels in a digital IF data frame slot having a certain correspondence relationship, and thus also based on the correspondence relationship can be obtained starting position the starting position of the current play data broadcasting channels occupied in a digital IF data frame slot, currently playing data obtained at this time broadcasting channels occupy a digital IF data frame slots is null symbol data in the first frame of a slot starting point for calculating, in fact, in the current digital IF data frame null symbol is not necessarily the first slot in the data frame, there may FIG. shown offset slot 5, and a null symbol position on the digital IF data and the current frame data frame digital intermediate frequency zero symbol 号位置非常接近,因此,再结合上一个数字中频数据帧中的零符号位置,就可以最终确定当前播放频道的播放数据在当前数字中频数据帧中占用的时隙的起始位置。 A position very close to the number, therefore, combined on a null symbol position in the digital IF data frame, can be finally determined start position data of the currently playing player in the current channel is occupied by the digital IF data frame slots. 只对当前数据帧中该起始位置上的数据进行DDC处理,即为只对当前播放频道的播放数据进行DDC处理。 Only the data on the starting position of the current data frame is performed DDC process, namely only the data of a current broadcasting channels play DDC process is performed.

[0036] 在本步骤201中,如果当前数字中频数据帧为待解析的第一个数据帧,由于无法获知零符号位置的时隙偏移,也就无法确定当前数字中频数据帧中当前播放频道的播放数据的位置,因此,需要对所有播放频道的播放数据进行DDC处理。 [0036] In the present step 201, if the current data frame is the first digital IF data frame to be resolved, since the slot offset not know the position of the null symbol, it can not determine the current digital IF data frame currently broadcasting channels the position of the played data, therefore, needs to be processed for DDC-play data of all broadcasting channels.

[0037] 步骤202:对所述基带数据进行帧同步和频偏同步处理,得到同步信息; [0037] Step 202: the baseband frequency offset frame synchronization and data synchronization processing, obtain the synchronization information;

[0038] 其中,所述对基带数据进行帧同步处理包括:如果基带数据是对待解析的第一个数据帧进行DDC处理得到的,对基带数据进行帧同步;根据帧同步信息估计当前数字中频数据帧的零符号位置。 [0038] wherein, the frame synchronization processing includes a baseband data: If the baseband data is to treat the first data frame analyzer performs DDC process obtained baseband data frame synchronization; current digital IF data frame synchronization information is estimated based on null symbol position of the frame.

[0039] 此处,可以采用现有的零符号位置估计方法对当前数字中频数据帧的零符号位置进行估计,本申请实施例对此并不做限定。 [0039] Here, the null symbol may be employed conventional position estimation method of the null symbol position of the current digital IF data frame is estimated, application of the present embodiment does not restrict this embodiment.

[0040] 另外,如果基带数据是对待解析的非第一帧进行DDC处理得到的,对基带数据进行帧同步微调;根据帧同步微调得到的偏移信息,对上一个数字中频数据帧的零符号位置进行更新,得到当前数字中频数据帧的零符号位置。 [0040] Further, if the baseband data is to treat the non-resolvable first frame DDC process obtained baseband data frame synchronization trimming; offset information obtained frame synchronization fine tuning, intermediate frequency data on a digital frame null symbol according to location update, obtain the current data frame digital IF null symbol position.

[0041] 此处,可以采用现有的零符号位置更新方法,如,对上一个数据帧中的零符号位置向前或者向后调整预置个数的符号位,获得当前数据帧的零符号位置。 [0041] Here, the null symbol may be employed conventional location update method, such as, adjusting the symbol bit forward or backward for a preset number of null symbol position of a data frame, the current data frame is obtained null symbol position. 本申请实施例对此并也不做限定。 Embodiments of the present application, and this is no limitation.

[0042] 步骤203:根据所述同步信息对所述基带数据进行解调和解码处理,得到被播放的数据。 [0042] Step 203: demodulating and decoding processing according to the synchronization information of the base band data, the data obtained being played.

[0043] 其中,所述根据同步信息对所述基带数据进行解调和解码处理,得到被播放的数据包括:如果基带数据是对待解析的第一个数据帧进行DDC处理得到的,根据帧同步时确定的零符号位置和搜台时获得的当前播放频道的播放数据在一个基带数据帧中占用的时隙的起始位置,确定当前播放频道的播放数据在DDC处理得到的基带数据中占用的时隙的起始位置;对确定的时隙的起始位置上的数据进行解调和解码处理。 [0043] wherein said demodulating and decoding processing according to the synchronization information with the data base, to obtain data to be played comprises: if the baseband data is to treat the first frame of the data analysis process DDC obtained according to a frame sync the starting position of the determined play data null symbol position and the current broadcasting channels obtained when the station search occupies a baseband data frame slots, determines that the play data of the current playing channel is occupied baseband data DDC processing obtained in the starting position of the time slot; start position of data on the determined time slot demodulating and decoding process.

[0044] 例如,如果基带数据时对待解析的第一个数据帧进行DDC处理得到的,因此,该基带数据中包含了所有播放频道的播放数据,根据帧同步时确定的零符号位置和搜台时获得的当前播放频道的播放数据在一个基带数据帧中占用的时隙的起始位置,同样也可以确定出当前播放频道的播放数据在DDC处理得到的基带数据中占用的时隙的起始位置,这样就可以只对基带数据中当前播放频道的播放数据进行解调和解码处理。 [0044] For example, if deal with the first parsed data baseband data frame DDC process obtained, and therefore, the baseband data contains playback data for all broadcasting channels, according to the frame synchronization is determined that the null symbol position and a channel search current playback start position of the data obtained when broadcasting channels occupies a baseband data frame time slots, also may determine the starting player currently playing data channel occupancy data in the baseband processing obtained DDC slots position, so that the base can only demodulates and decodes the playback data processed with the current playing channel.

[0045] 由上述实施例可以看出,与现有技术相比,本申请具有如下优点: [0045] As can be seen from the foregoing embodiment, as compared with the prior art, the present application has the following advantages:

[0046] 在进行解析时,由于只对当前数字中频数据帧中当前播放频道的播放数据进行DDC处理,降低了DDC处理的数据帧的长度,由此提高了接收机的解析速度,进而也就保证了处理器在完成下一帧数字中频数据的接收及缓存之前,完成当前数字中频数据帧的解析处理,减少了音频解析处理的时间,实现了实时流畅地播放节目,避免出现播放节目可顿的现象。 [0046] When parsing performed, since only the playback data for the current data frame digital IF channel is currently playing DDC process, reducing the DDC data processing frame length, thereby increasing the speed of parsing the receiver, and thus it ensure that the processor prior to completion of the next frame digital IF receiving data and cache, complete the current analysis processing digital IF data frames, reducing the time audio analysis process, to achieve a smooth real-time broadcast programs to avoid broadcast programs may Dayton The phenomenon. 同时,降低了接收机中处理器的CPU占有率,降低了处理器功耗。 At the same time, reducing the share of the receiver processor CPU, processor efficiency. [0047] 实施例二 [0047] Second Embodiment

[0048] 下面详细说明在数据音频广播信号接收中,数据音频广播信号的解析方法。 [0048] In the audio data received broadcast signal, the broadcast data of the audio signal analysis method is described in detail below. 请参阅图6,其为本申请一种数字音频广播信号的解析方法的具体实施流程图。 Please refer to FIG. 6, the analytical method for digital audio broadcasting signal which is a detailed flowchart of the present application. 包括以下步骤: Comprising the steps of:

[0049] 步骤601:当数字音频广播信号接收机缓存的数字中频数据达到一帧的长度时,判断当前数字中频数据帧是否是第一个数据帧,如果是,进入步骤602,否则,进入步骤603 ; [0049] Step 601: when the digital audio broadcasting signal receiver of the digital IF data buffer reaches a length of time, it is determined whether the current digital IF data frame is the first frame of data, and if so, proceeds to step 602, otherwise, proceeds to step 603;

[0050] 步骤602:对第一个数据帧中的所有播放频道的播放数据进行DDC处理,得到基带数据,进入步骤605; [0050] Step 602: the playing data of all broadcasting channels of the first data frames to DDC to give baseband data, proceeds to step 605;

[0051] 步骤603:根据上一个数字中频数据帧中的零符号位置和搜台时获得的当前播放频道的播放数据在一个基带数据帧中占用的时隙的起始位置,确定当前播放频道的播放数据在当前数字中频数据帧中占用的时隙的起始位置; [0051] Step 603: The play data on a digital IF data frames and null symbol position broadcasting channels currently obtained when the search start position occupied by the station in a baseband data frame slots, determines the current playing channel playback start position in the current data takes digital IF data frame slot;

[0052] 步骤604:对步骤603中得到的起始位置上的数据进行DDC处理,得到基带数据,进入步骤606 ; [0052] Step 604: the data on the starting position obtained in step 603 performs DDC processing a baseband data, proceeds to step 606;

[0053] 步骤605:对步骤602中得到的基带数据进行帧同步和频偏同步处理,得到同步信息,并估计第一个数据帧中零符号的位置,进入步骤607 ; [0053] Step 605: the base band data obtained in step 602 and the frame synchronization frequency offset synchronization, obtain synchronization information, and the estimated position of the first data frame in the null symbol, goes to step 607;

[0054] 步骤606:对步骤604中得到的基带数据进行帧同步微调和频偏同步处理,得到同步信息,并根据帧同步微调得到的偏移信息,对上一个数据帧中的零符号位置进行更新,得到当前数据帧中的零符号位置,进入步骤608 ; [0054] Step 606: the base band data obtained in step 604, frame synchronization and frequency offset trim sync obtain synchronization information, and trimming the offset frame synchronization information obtained, a position of the null symbol data frames to update, to obtain the null symbol position in the current data frame proceeds to step 608;

[0055] 步骤607:根据同步信息对第一帧中当前播放频道的播放数据对应的基带数据进行解调解码处理,进入步骤609 ; [0055] Step 607: The first step of the synchronization information frame corresponding to the currently playing play data channel baseband data demodulation and decoding process proceeds 609;

[0056] 步骤608:根据同步信息对步骤604中的基带数据进行解调解码处理,进入步骤609 ; [0056] Step 608: The step of synchronizing the baseband data information in step 604 demodulate and decode process proceeds 609;

[0057] 步骤609:输出解调解码后的被播放数据,返回步骤601。 [0057] Step 609: the played data demodulating and decoding the output returns to step 601.

[0058] 由上述实施例可以看出,与现有技术相比,本申请具有如下优点: [0058] As can be seen from the foregoing embodiment, as compared with the prior art, the present application has the following advantages:

[0059] 在进行解析时,由于只对当前数字中频数据帧中当前播放频道的播放数据进行DDC处理,降低了DDC处理的数据帧的长度,由此提高了接收机的解析速度,进而也就保证了处理器在完成下一帧数字中频数据的接收及缓存之前,完成当前数字中频数据帧的解析处理,减少了音频解析处理的时间,实现了实时流畅地播放节目,避免出现播放节目卡顿的现象。 [0059] When parsing performed, since only the playback data for the current data frame digital IF channel is currently playing DDC process, reducing the DDC data processing frame length, thereby increasing the speed of parsing the receiver, and thus it ensure that the processor prior to completion of the next frame digital IF receiving data and cache, complete the current analysis processing digital IF data frames, reducing the time audio analysis process, to achieve smooth playback of real-time programs and avoid broadcast programs appear Caton The phenomenon. 同时,降低了接收机中处理器的CPU占有率,降低了处理器功耗。 At the same time, reducing the share of the receiver processor CPU, processor efficiency.

[0060] 实施例三 [0060] Example three

[0061] 与上述一种数字音频广播信号的解析方法相对应,本申请实施例还提供了一种数字音频广播信号的解析装置。 [0061] The analytical method described above and a digital audio broadcasting signal corresponds to the application of the present embodiment also provides analytical means to a digital audio broadcasting signal. 请参阅图7,其为本申请一种数字音频广播信号的解析装置的一个实施例的结构图。 Please refer to FIG. 7, the analysis means a digital audio broadcasting signal which application is a configuration diagram of the present embodiment. 该装置包括:数字下变频处理单元701、同步处理单元702和解调解码处理单元703,其中, The apparatus comprising: a conversion processing unit 701, a decoding unit 702 and a demodulation processing unit 703 in the digital synchronization processing, wherein

[0062] 数字下变频处理单元701,用于如果接收机接收的当前数字中频数据帧为待解析的第一个数据帧,对当前数字中频数据帧中所有播放频道的播放数据进行DDC处理,得到基带数据,否则,对当前数字中频数据帧中当前播放频道的播放数据进行DDC处理,得到基带数据; [0062] The digital conversion processing unit 701, the digital IF data to the receiver if the current received data frame is the first frame to be resolved, the data of the current playing digital IF data frame is performed for all broadcasting channels DDC to give baseband data, otherwise, the data of the current playing digital IF data frame currently playing DDC channel is processed to obtain baseband data;

[0063] 同步处理单元702,用于对所述基带数据进行帧同步和频偏同步处理,得到同步信息; [0063] The synchronization processing unit 702, the baseband data for frame synchronization and frequency offset synchronization, obtain synchronization information;

[0064] 解调解码处理单元703,用于根据所述同步信息对所述基带数据进行解调和解码处理,得到被播放的数据。 [0064] The demodulation and decoding processing unit 703, for demodulating and decoding processing according to the synchronization information of the base band data, the data obtained being played.

[0065] 优选的,请参阅图8,其为本申请一种数字下变频处理单元的一个结构示意图。 [0065] Preferably, see Figure 8, a schematic structural conversion to a digital processing unit in which the present application. 如图8所示,数字下变频处理单元701包括:第一位置确定子单元7011和数字下变频处理子单元7012, 8, digital conversion processing unit 701 comprises: a first position determination sub-conversion processing sub-unit 7011 and the digital unit 7012,

[0066] 第一位置确定子单元7011,用于根据上一个数字中频数据帧中的零符号位置和搜台时获得的当前播放频道的播放数据在一个基带数据帧中占用的时隙的起始位置,确定当前播放频道的播放数据在当前数字中频数据帧中占用的时隙的起始位置; [0066] a first position determination sub-unit 7011, for initiating play data obtained from the zero symbol on a digital IF data frame and the location of the search station is currently broadcasting channels occupies a baseband data frame slot position, determining a starting position of the currently playing player data channel occupancy in the current digital IF data frame slot;

[0067] 数字下变频处理子单元7012,用于对确定的时隙的起始位置上的数据进行数字下变频处理。 The conversion processing sub-unit [0067] 7012 numbers, data for determining the position of the starting slot of the digital down-conversion process.

[0068] 优选的,请参阅图9,其为本申请一种同步处理单元的一个结构示意图。 [0068] Preferably, see Figure 9, which is a schematic structural diagram of the present application a synchronization processing unit. 如图9所示,同步处理单元702包括:第一帧同步处理子单元7021和第一零符号位置确定子单元7022, 9, the synchronization processing unit 702 comprises: a first sub-frame synchronization processing unit 7021 and a first null symbol position determination sub-unit 7022,

[0069] 第一帧同步处理子单元7021,用于如果基带数据是对待解析的第一个数据帧进行DDC处理得到的,对基带数据进行帧同步; [0069] The first frame synchronization processing sub-unit 7021, the processing for DDC obtained, the baseband data if the frame synchronization is to treat the first baseband data frames from a data analysis;

[0070] 第一零符号位置确定子单元7022,用于根据帧同步信息估计当前数字中频数据帧的零符号位置。 [0070] a first null symbol position determination sub-unit 7022, a null symbol position of the current digital IF data frame according to the frame synchronization information estimation.

[0071] 可替换的,请参阅图10,其为本申请一种同步处理单元的另一个结构示意图。 [0071] Alternatively, see FIG. 10, which is a schematic view of the present application further structural units, one synchronization process. 如图10所示,同步处理单元702包括: 10, the synchronization processing unit 702 comprises:

[0072] 第二帧同步处理子单元7023,用于如果基带数据是对待解析的非第一帧进行DDC处理得到的,对基带数据进行帧同步微调; [0072] The second frame synchronization processing subunit 7023, for the first frame obtained DDC process, the base band data if the frame synchronization trimming baseband data is to treat the non-resolvable;

[0073] 第二零符号位置确定子单元7024,用于根据帧同步微调得到的偏移信息,对上一个数字中频数据帧的零符号位置进行更新,得到当前数字中频数据帧的零符号位置。 [0073] The second null symbol position determination sub-unit 7024, updated according to the offset information obtained trimming frame synchronization, a digital IF data to the null symbol position of the frame, digital intermediate frequency to obtain a current data frame null symbol position.

[0074] 优选的,请参阅图11,其为本申请一种解调解码处理单元的一个结构示意图。 [0074] Preferably, see Figure 11, which is a schematic structural diagram of the present application the decoding processing unit for demodulating. 如图11所示,解调解码处理单元703包括: 11, a demodulation decoding processing unit 703 comprises:

[0075] 第二位置确定子单元7031,用于如果基带数据是对待解析的第一个数据帧进行DDC处理得到的,根据帧同步时确定的零符号位置和搜台时获得的当前播放频道的播放数据在一个基带数据帧中占用的时隙的起始位置,确定当前播放频道的播放数据在DDC处理得到的基带数据中占用的时隙的起始位置; [0075] a second position determination sub-unit 7031, to obtain a base band data if the data is to treat the first DDC parsed frame processing, and in accordance with the obtained search station when the frame synchronization determining the current position of the null symbol of broadcasting channels playback start position occupied by the data in a baseband data frame slots, determines the starting position of the currently playing player data channel occupancy data in the baseband processing obtained DDC slots;

[0076] 解调解码处理子单元7032,用于对确定的时隙的起始位置上的数据进行解调和解码处理。 [0076] The demodulation and decoding processing subunit 7032, for determining the starting position of the data on the time slot of demodulating and decoding process.

[0077] 由上述实施例可以看出,与现有技术相比,本申请具有如下优点: [0077] As can be seen from the foregoing embodiment, as compared with the prior art, the present application has the following advantages:

[0078] 在进行解析时,由于只对当前数字中频数据帧中当前播放频道的播放数据进行DDC处理,降低了DDC处理的数据帧的长度,由此提高了接收机的解析速度,进而也就保证了处理器在完成下一帧数字中频数据的接收及缓存之前,完成当前数字中频数据帧的解析处理,减少了音频解析处理的时间,实现了实时流畅地播放节目,避免出现播放节目可顿的现象。 [0078] When parsing performed, since only the playback data for the current data frame digital IF channel is currently playing DDC process, reducing the DDC data processing frame length, thereby increasing the speed of parsing the receiver, and thus it ensure that the processor prior to completion of the next frame digital IF receiving data and cache, complete the current analysis processing digital IF data frames, reducing the time audio analysis process, to achieve a smooth real-time broadcast programs to avoid broadcast programs may Dayton The phenomenon. 同时,降低了接收机中处理器的CPU占有率,降低了处理器功耗。 At the same time, reducing the share of the receiver processor CPU, processor efficiency.

[0079]以上对本申请所提供的一种数字音频广播信号的解析方法和装置进行了详细介绍,本文中应用了具体实施例对本申请的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本申请的方法及其核心思想;同时,对于本领域的一般技术人员,在不脱离本发明描述的原理前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。 [0079] The above were of analytical method and apparatus of a digital audio broadcasting signal according to the present application provides a detailed description herein use specific embodiments of the principle and embodiments of the present application are set forth in description of the above embodiment except that to help understand the method and core ideas of the present application; at the same time, those of ordinary skill in the art, without departing from the principles described in the present invention, can make various improvements and modifications, improvements and modifications shall also be considered the scope of the present invention.

Claims (6)

  1. 1.一种数字音频广播信号的解析方法,其特征在于,包括: 如果接收机接收的当前数字中频数据帧为待解析的第一个数据帧,对当前数字中频数据帧中所有播放频道的播放数据进行数字下变频DDC处理,得到基带数据,否则,对当前数字中频数据帧中当前播放频道的播放数据进行DDC处理,得到基带数据; 对所述基带数据进行帧同步和频偏同步处理,得到同步信息,其中,所述对基带数据进行帧同步处理包括:如果基带数据是对待解析的第一个数据帧进行DDC处理得到的,对基带数据进行帧同步,根据帧同步信息估计当前数字中频数据帧的零符号位置;如果基带数据是对待解析的非第一个数据帧进行DDC处理得到的,对基带数据进行帧同步微调,根据帧同步微调得到的偏移信息,对上一个数字中频数据帧的零符号位置进行更新,得到当前数字中频数据帧的零 1. An analytical method for a digital audio broadcast signal, comprising: if the current received by the receiver digital IF data frame is the first frame of data to be parsed, playback of the current digital IF data frame of all broadcasting channels data conversion DDC processing digital obtain baseband data, otherwise, playback data in the current digital IF data frame currently broadcasting channels is DDC processing a baseband data; the baseband data frame synchronization and frequency offset synchronization, to give synchronization information, wherein said frame synchronization processing includes a baseband data: If the baseband data is to treat the first data frame analyzer performs DDC process obtained baseband data frame synchronization, estimate the current digital IF data based on the frame synchronization information null symbol position of the frame; if the baseband data is to treat non-first parsed data frame DDC process obtained baseband data frame synchronization fine tuning, according to the offset information frame synchronization trimming obtained frames of a digital IF data null symbol position is updated, digital intermediate frequency to obtain a current data frame zero 号位置; 根据所述同步信息对所述基带数据进行解调和解码处理,得到被播放的数据。 Position numbers; demodulating and decoding processing according to the synchronization information of the base band data, the data obtained being played.
  2. 2.根据权利要求1所述的方法,其特征在于,所述对当前数字中频数据帧中当前播放频道的播放数据进行DDC处理包括: 根据上一个数字中频数据帧中的零符号位置和搜台时获得的当前播放频道的播放数据在一个基带数据帧中占用的时隙的起始位置,确定当前播放频道的播放数据在当前数字中频数据帧中占用的时隙的起始位置; 对确定的时隙的起始位置上的数据进行DDC处理。 2. The method according to claim 1, wherein said process comprises for DDC data of the current playing digital IF data frame currently playing channel: in accordance with a digital IF data frames and null symbol position search table current playback start position of the data obtained when broadcasting channels occupies a baseband data frame slots, determines the starting position of the currently playing player data channel occupancy in the current digital IF data frame slots; determining the the starting position of the data on the time slot is processed DDC.
  3. 3.根据权利要求1所述的方法,其特征在于,所述根据所述同步信息对所述基带数据进行解调和解码处理,得到被播放的数据包括: 如果基带数据是对待解析的第一个数据帧进行DDC处理得到的,根据帧同步时确定的零符号位置和搜台时获得的当前播放频道的播放数据在一个基带数据帧中占用的时隙的起始位置,确定当前播放频道的播放数据在DDC处理得到的基带数据中占用的时隙的起始位置; 对确定的时隙的起始位置上的数据进行解调和解码处理。 3. The method according to claim 1, wherein said demodulating and decoding processing according to the synchronization information with the data base, to obtain data to be played comprises: if the baseband data is first treated parsed a data frame processing start position DDC obtained, according to playback data frame synchronization symbol position is determined and the current zero obtained when broadcasting channels search table occupies a baseband data frame slots, determines the current playing channel playback start position occupied by the data in the baseband processing DDC data obtained in the time slots; start position of data on the determined time slot demodulating and decoding process.
  4. 4.一种数字音频广播信号的解析装置,其特征在于,包括: 数字下变频处理单元,用于如果接收机接收的当前数字中频数据帧为待解析的第一个数据帧,对当前数字中频数据帧中所有播放频道的播放数据进行DDC处理,得到基带数据,否则,对当前数字中频数据帧中当前播放频道的播放数据进行DDC处理,得到基带数据; 同步处理单元, 用于对所述基带数据进行帧同步和频偏同步处理,得到同步信息,其中,所述同步处理单元包括:第一帧同步处理子单元,用于如果基带数据是对待解析的第一个数据帧进行DDC处理得到的,对基带数据进行帧同步;第一零符号位置确定子单元,用于根据帧同步信息估计当前数字中频数据帧的零符号位置;第二帧同步处理子单元,用于如果基带数据是对待解析的非第一个数据帧进行DDC处理得到的,对基带数据进行帧同步微调 A digital audio broadcasting signal analysis apparatus, characterized in that, comprising: a digital conversion processing unit configured to, if the current digital IF receiver receives the data frame is the first frame of data to be parsed, the current digital intermediate frequency play data for all broadcasting channels of data frames DDC processing a baseband data, otherwise, playback data in the current digital IF data frame currently broadcasting channels is DDC processing a baseband data; synchronization processing means, for the baseband frame synchronization and frequency offset data synchronization processing, obtain synchronization information, wherein said synchronization processing unit comprises: a first frame synchronization processing sub-unit, for if the first data is treated baseband data parsed frame DDC treating the resulting the baseband data frame synchronization; a first null symbol position determination sub-unit, for estimating the current digital IF data frame based on the frame synchronization null symbol position information; a second frame synchronization processing subunit, for treatment if the baseband data is parsed the non-first data frame obtained DDC process, the baseband data frame synchronization trim ;第二零符号位置确定子单元,用于根据帧同步微调得到的偏移信息,对上一个数字中频数据帧的零符号位置进行更新,得到当前数字中频数据帧的零符号位置; 解调解码处理单元,用于根据所述同步信息对所述基带数据进行解调和解码处理,得到被播放的数据。 ; A second null symbol position determination sub-unit configured to update the information obtained based on the offset frame synchronization fine tuning, intermediate frequency to a digital data frame is null symbol position to obtain the current data frame digital IF null symbol position; demodulating and decoding processing means for demodulating and decoding processing according to the synchronization information of the base band data, the data obtained being played.
  5. 5.根据权利要求4所述的装置,其特征在于,所述数字下变频处理单元包括: 第一位置确定子单元,用于根据上一个数字中频数据帧中的零符号位置和搜台时获得的当前播放频道的播放数据在一个基带数据帧中占用的时隙的起始位置,确定当前播放频道的播放数据在当前数字中频数据帧中占用的时隙的起始位置;数字下变频处理子单元,用于对确定的时隙的起始位置上的数据进行数字下变频处理。 5. The apparatus as claimed in claim 4, wherein said digital-conversion processing unit comprises: a first position determination sub-unit, for obtaining zero symbols according to a digital IF data frame and the location search table playback start position data of the broadcasting channels currently occupied in a baseband data frame slots, determines the starting position of the currently playing player data channel occupancy in the current digital IF data frame slot; digital conversion processing sub means for determining the starting position of the data on the time slot of the digital down-conversion process.
  6. 6.根据权利要求4所述的装置,其特征在于,所述解调解码处理单元包括:第二位置确定子单元,用于如果基带数据是对待解析的第一个数据帧进行DDC处理得到的,根据帧同步时确定的零符号位置和搜台时获得的当前播放频道的播放数据在一个基带数据帧中占用的时隙的起始位置,确定当前播放频道的播放数据在DDC处理得到的基带数据中占用的时隙的起始位置;解调解码处理子单元,用于对确定的时隙的起始位置上的数据进行解调和解码处理。 6. The apparatus according to claim 4, wherein said demodulation and decoding processing unit comprises: a second position determination sub-unit configured to obtain baseband data is treated if the first frame of data analysis processing DDC the playback data obtained when frame synchronization is determined that the null symbol position and the search station is currently broadcasting channels starting position occupied in a baseband data frame time slots, determining a current play data broadcasting channels in the DDC treating the resulting baseband the starting position of time slot occupied by the data; demodulating and decoding processing sub-unit, for determining the starting position of the data on the time slot of demodulating and decoding process.
CN 201110025370 2011-01-24 2011-01-24 Method and device for analyzing digital audio broadcasting signals CN102610230B (en)

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