Wireless communication device and communication terminal
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsAkira Shibuta, Yutaka Suwa, Hiroyuki Ishihara, Kyoichi Obana
Life of this patent
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Abstract
A device divides a sampled sound signal into a high frequency signal and a low frequency signal, individually encodes the high frequency signal and the low frequency signal, and generates error detection code pertinent to the high frequency ADPCM data and the low frequency ADPCM data. The device replaces data pertinent to some of a plurality of bits which configure the low frequency ADPCM data with the error detection code and transmits them. A receiver side receives the high frequency ADPCM data and the low frequency ADPCM data, and individually processes the high frequency ADPCM data and the low frequency ADPCM data in accordance with a value of the error detection code.
Claims25
A wireless communication device that establishes a digital link on a wireless channel and that performs a communication by a sound packet including a sound signal, which is encoded by means of adaptive differential pulse code modulation (ADPCM), and an error detection code, the wireless communication device comprising:
- an ADPCM encoding unit that divides a sampled sound signal into a high frequency signal and a low frequency signal and individually encodes the high frequency signal and the low frequency signal by means of adaptive differential pulse code modulation to thereby convert the high frequency signal into high frequency ADPCM data having a first number of bits, and convert the low frequency signal into low frequency ADPCM data having a second number of bits;
- an error detection code generation unit that generates an error detection code that is pertinent to the high frequency ADPCM data and the low frequency ADPCM data;
- a transmission data conversion unit that places the error detection code that is pertinent to the high frequency ADPCM data and the low frequency ADPCM data in only data pertinent to the low frequency ADPCM data;
- and
- a received data processing unit that receives the high frequency ADPCM data and the low frequency ADPCM data including the error detection code that is pertinent to the high frequency ADPCM data and the low frequency ADPCM data, and that individually processes the high frequency ADPCM data and the low frequency ADPCM data in accordance with a value of the error detection code that is pertinent to the high frequency ADPCM data and the low frequency ADPCM data.
A communication terminal configuring a wireless communication device that establishes a digital link on a wireless channel and that performs communication by a sound packet which includes a sound signal encoded by adaptive differential pulse code modulation (ADPCM) and an error detection code, the communication terminal comprising:
- an ADPCM encoding unit that divides a sampled sound signal into a high frequency signal and a low frequency signal and individually encodes the high frequency signal and the low frequency signal by means of adaptive differential pulse code modulation to thereby convert the high frequency signal into high frequency ADPCM data having a first number of bits, and convert the low frequency signal into low frequency ADPCM data having a second number of bits;
- an error detection code generation unit that generates an error detection code pertinent to the high frequency ADPCM data having the first number of bits and the low frequency ADPCM data having the second number of bits;
- a transmission data conversion unit that replaces data pertinent to some of a plurality of bits which configure the low frequency ADPCM data with the error detection code generated by the error detection code generation unit;
- and
- a data transmission unit that is configured to transmit the high frequency ADPCM data and the low frequency ADPCM data which is partially replaced by the data conversion unit to a communication opponent.
A communication terminal configuring a wireless communication device that establishes a digital link on a wireless channel and that performs a communication by a sound packet which includes a sound signal encoded by adaptive differential pulse code modulation (ADPCM) and an error detection code, the communication terminal comprising:
- a received data processing unit that extracts, from a received signal, high frequency ADPCM data, low frequency ADPCM data, and an error detection code, wherein,
- when an error is detected by means of the error detection code, the received data processing unit performs first signal processing on the high frequency ADPCM data received along with the error detection code, and second signal processing on the low frequency ADPCM data received along with the error detection code.
Dependencies are inferred from the claim text.