JP2576791B2 - Speech codec test circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speech signal selecting means for selecting one speech signal from a large number of speech signals according to an instruction and supplying the selected speech signal to a speech codec. The test signal determination circuit compares the one audio signal with the decoded audio signal to encode the signal, decodes the encoded audio to output a decoded audio signal, and thereby operates the audio codec. The present invention relates to a speech codec test circuit for performing a test.

[0002]

2. Description of the Related Art As a method of performing an operation test of a speech codec, a speech signal is input to a speech codec, and a decoded speech signal obtained by encoding and decoding the inputted speech signal is defined as an input speech signal. A method is known in which the normality of the operation of the speech codec is determined by comparison (for example, JP-A-63-273895). This conventional method will be described with reference to FIG.

In FIG. 2, reference numeral 201 denotes a speech codec,
202 is an encoder of the audio codec 201, 203 is a decoder of the audio codec 201, 204 is an audio signal storage unit, 205 is an audio signal selection circuit, 206 is an input audio storage unit, and 207 is a test termination judgment. A circuit 209 is a test result determination circuit, and 210 is a test result storage unit.

Next, the operation of the speech codec test circuit of FIG. 2 will be described. The audio signal storage unit 204 stores a plurality of audio signals used for a test. The audio signal selection circuit 205 selects one audio signal from the audio signal storage unit 204 according to the instruction, and stores the selected audio signal in the input audio storage unit 2.
06. The encoder 202 includes the input audio storage unit 2
In step S 06, a speech signal is input, encoding is performed, and the encoded code is output to the decoder 203. Decoder 2
03 receives a code from the encoder 202, performs a decoding process, and outputs a decoded audio signal to the test result determination circuit 208.

[0005] The test result determination circuit 208 compares the audio signal input from the input audio storage section 206 with the decoded audio signal input from the decoder 203 to determine the normality of the operation of the audio codec 201. A determination is made, and the determination result is stored in the test result storage unit 209. When the test result determination circuit 208 stores the determination result in the test result storage unit 209, the test end determination circuit 207 determines that the operation test on the selected audio signal has been completed.

When the test end determination circuit 207 determines that the operation test on the selected audio signal has been completed, it transmits a signal indicating that the operation test on the selected audio signal has been completed to the audio signal selection circuit 205. Then, it instructs to output the next audio signal. Audio signal selection circuit 20
5 receives an instruction from the test end determination circuit 207 to output the next audio signal, selects one new audio signal from the audio signal storage unit 204, and stores the selected audio signal in the input audio storage unit 206. Store. In the same manner, the audio signal is sequentially selected from the audio signal storage unit 204, and the operation test of the audio codec 201 is performed on the selected audio signal.

[0007]

In the conventional speech codec test circuit, when a large number of speech signals are sequentially input to the speech codec and the operation test of the speech codec is performed, one speech signal is tested. Since the decoding process is performed after the encoding process is completed and the encoding process of the next audio signal is started after the decoding process is completed, the operation waiting time of the encoder and the decoder is increased and the efficiency is increased. There was a problem that was bad.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a speech codec test circuit which has a low operation waiting time of an encoder and a decoder and is efficient in testing a speech codec. .

[0009]

According to a speech codec test circuit of the present invention, a speech selection means selects one speech signal from a large number of speech signals and supplies the selected speech signal to the speech codec. Encoding a given one audio signal, decoding the encoded audio to output a decoded audio signal, and a test result determination circuit comparing the one audio signal with the decoded audio signal, An audio codec test circuit for performing an operation test of an audio codec, wherein the audio codec inputs an audio signal and determines whether or not encoding processing has been completed for the input audio signal. An encoding end determination circuit, and an input code storage unit that temporarily stores the code encoded by the encoder of the audio code decoder and passes the stored code to the decoder of the audio code decoder. Have,
The encoding end determination circuit is configured to input the audio signal to the audio codec and determine that the encoding process of the encoder has been completed for the input audio signal. Instructs to select the next audio signal to be input to the audio codec.

Further, the input code storage section has only a storage capacity for storing one encoded audio signal, and until the stored audio signal is passed to the decoder, the input code storage section receives a new audio signal from the encoder. It is preferable that the audio signal is not stored. In this case, the configuration is simple,
Data transfer between the input code storage unit and the decoder can be simple.

Further, the input code storage unit has a storage capacity capable of storing a plurality of encoded audio signals, and passes the stored audio signals to the decoder in a FIFO format. It has a storage capacity capable of storing a plurality of audio signals, sequentially stores the audio signals output to the audio codec, and stores the decoded audio signals each time the decoder outputs the audio signal to the test result determination circuit. It is preferable to output an audio signal corresponding to the decoded audio signal to the test result determination circuit. In this case, the waiting time in the processing is further reduced.

[0012]

When the encoding end determination circuit determines that the encoding process has been completed for the audio signal input to the audio codec, the next audio signal input to the audio codec is input to the audio selecting means. Instruct the user to select Therefore, while the decoder of the audio codec receives one encoded audio signal from the input storage unit and performs the decoding process, the encoder of the audio codec decodes the code of the next audio signal. Can start the conversion process. This reduces the operation latency of the encoder and decoder.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing one embodiment of a speech codec test circuit of the present invention. In FIG. 1, 101 is a speech codec, 102 is an encoder of a speech codec,
103 is an audio codec decoder, 104 is an audio signal storage unit, 105 is an audio signal selection circuit, 106 is an input audio storage unit, 107 is an encoding end determination circuit, 108 is an input code storage unit, and 109 is a test. The result determination circuit 110 is a test result storage unit.

The audio signal storage unit 104 stores a plurality of audio signals used for a test. Audio signal selection circuit 105
Selects audio signals one by one from the audio signal storage unit 104 based on the instruction, and stores the selected audio signals in the input audio storage unit 106. The input voice storage unit 106 stores the stored voice signal in the voice codec 101 and the test result determination circuit 10.
9 and transmitted.

The encoder 102 has an input speech storage unit 106
The audio signal supplied to the audio codec decoder 101 is input, an encoding process is performed, and a code as a result of the encoding process is stored in the input code storage unit 108. The encoder 102
When the code has been stored in the input code storage unit 108, the coding end determination circuit 107 determines that the coding process of one audio signal has been completed. When the encoding end determination circuit 107 determines that the encoding process has ended, the audio signal selection circuit 1
At 05, a signal indicating that the encoding process has been completed is transmitted.

Upon receiving a signal indicating that the encoding process has been completed from the encoding completion determination circuit 107, the audio signal selection circuit 105 selects one new audio signal from the audio signal storage unit 104, and selects the selected audio signal. Input signal to audio storage unit 1
06.

On the other hand, the decoder 103 inputs a code for one audio signal from the input code storage unit 108, performs a decoding process, and outputs the decoded audio signal to the test result judgment circuit 10.
9 is output. While the decoder 103 performs the decoding process of the code stored in the input code storage unit 108, the encoder 102 outputs the audio signal from the input audio storage unit 106 independently of the operation of the decoding process. Is newly input, an encoding process is performed, and the newly encoded code is stored in the input code storage unit 10.
8 is stored. However, when the encoder 102 stores the newly encoded code in the input code storage unit 108, the decoder 103
Must have already been entered. Of course, the storage capacity of the input code storage unit 108 may be increased to store a plurality of audio signals, and the stored audio signals may be output in a FIFO format.
In this case, for example, a storage capacity for storing a plurality of audio signals output to the audio codec 101 is given to the input audio storage unit 106, and each time the decoder 103 outputs an audio signal decoded, It would be better to output the corresponding audio signal from the input audio storage.

The test result determination circuit 109 compares the audio signal received from the input audio storage unit 106 with the decoded audio signal input from the decoder 103 of the audio codec decoder, and The normality of the operation is determined, and the determination result is stored in the test result storage unit 110.
In the same manner, the encoder 102 operates in the
6, the decoder 103 sequentially inputs codes from the input code storage unit 108, and performs an operation test of the voice code decoder 101.

[0019]

As described above, according to the present invention, while the decoder of the audio codec is decoding one encoded audio signal, the encoding of the audio codec is performed. The coding process of the next audio signal is performed by the encoder, so that the operation waiting time of the encoder and the decoder is reduced, and the operation test of the audio codec is efficiently performed using a large number of audio signals. There is an effect that can be.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a speech codec test circuit of the present invention.

FIG. 2 is a configuration diagram showing a conventional speech codec test circuit.

[Explanation of symbols]

 Reference Signs List 101 audio code decoder 102 encoder 103 decoder 104 audio signal storage unit 105 audio signal selection circuit 106 input audio storage unit 107 encoding end determination unit 108 input code storage unit 109 test result determination circuit 110 test result storage unit

Claims (3)

(57) [Claims] 1. An audio selecting means, comprising:
One audio signal is selected and supplied to an audio codec, the audio codec encodes the given one audio signal, decodes the encoded audio, outputs a decoded audio signal, and provides a test result determination circuit. By comparing the one audio signal with the decoded audio signal, in an audio codec test circuit that performs an operation test of the audio codec, the audio codec inputs and inputs the audio signal. For the audio signal, an encoding end determination circuit that determines whether the encoding process has been completed, and a code that is temporarily stored by an encoder of the audio codec, and temporarily stores the stored code. An input code storage unit to be passed to a decoder of the audio code decoder, wherein the encoding end determination circuit inputs the audio signal to the audio code decoder, and encodes the input audio signal. Device encoding process For each determined to have completion, the sound selection unit to the audio input to code decoder next speech code decoder test circuit, characterized in that an instruction to select an audio signal. 2. The apparatus according to claim 1, wherein the input code storage unit stores the encoded 1
2. The audio codec test circuit according to claim 1, wherein the audio codec test circuit has only a storage capacity for storing one audio signal, and does not store a new audio signal from the encoder until the stored audio signal is passed to the decoder. . 3. The input code storage unit has a storage capacity capable of storing a plurality of encoded audio signals, passes the stored audio signals to the decoder in a FIFO format, and the input audio storage unit It has a storage capacity capable of storing a plurality of audio signals, sequentially stores the audio signals output to the audio codec, and stores the decoded audio signals each time the decoder outputs the audio signal to the test result determination circuit. 2. The audio codec test circuit according to claim 1, wherein the audio signal corresponding to the decoded audio signal is output to the test result determination circuit.