Title:
ENCRYPTION/DECRYPTION DEVICE FOR VOICE/MUSIC INTEGRATED SIGNAL
Document Type and Number:
Japanese Patent JP2014139674
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide excellent sound quality for all voice signals and music signals by various bit rates by effectively selecting an inside module according to the characteristic of an input signal.SOLUTION: An encryption device 100 for voice/music integrated signal includes: a stereo encryption unit 120 for extracting stereo audio image information by down mixing with monophonic signal when an input signal is a stereo signal by an input signal analysis unit 110; a frequency band extension unit 130 for extending the input signal to a high frequency band signal; a sampling rate conversion unit 140 for converting sampling ratio for output signal by the frequency band extension unit 130; a voice signal encryption unit 150 for encrypting the input signal; a music signal encryption unit 160 for encrypting the input signal by using a music encryption module when the input signal is a signal having musical characteristic; and a bit stream generation unit 170 for generating a bit stream by using an output signal from the voice signal encryption unit 150 and an output signal from the music signal encryption unit 160.
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Inventors:
LEE TAE JIN
BEACK SEUNG KWON
KIM MINJE
JANG DAE YOUNG
SEO JEONG IL
KANG KYEONGOK
HONG JIN-WOO
PARK HOCHONG
PARK YOUNG-CHEOL
BEACK SEUNG KWON
KIM MINJE
JANG DAE YOUNG
SEO JEONG IL
KANG KYEONGOK
HONG JIN-WOO
PARK HOCHONG
PARK YOUNG-CHEOL
Application Number:
JP2014023744A
Publication Date:
July 31, 2014
Filing Date:
February 10, 2014
Export Citation:
Assignee:
ELECT & TELECOMM RESEARCH INST
UNIV KWANGWOON IND ACAD COLLAB
UNIV KWANGWOON IND ACAD COLLAB
International Classes:
G10L19/00; G10L19/008; G10L19/20; G10L21/038; G10L25/81; H03M7/30; H04S5/02
Domestic Patent References:
| JPH0897726A | 1996-04-12 | |||
| JPH0738437A | 1995-02-07 | |||
| JP2005107255A | 2005-04-21 | |||
| JP2013232007A | 2013-11-14 | |||
| JP2007525707A | 2007-09-06 |
Foreign References:
| WO2007086646A1 | 2007-08-02 | |||
| WO2005099243A1 | 2005-10-20 |
Other References:
JPN7015000016; Ｅｒｉｋ Ｓｃｈｕｉｊｅｒｓ， ｅｔ ａｌ．: 'Ｌｏｗ Ｃｏｍｐｌｅｘｉｔｙ Ｐａｒａｍｅｔｒｉｃ Ｓｔｅｒｅｏ Ｃｏｄｉｎｇ' Ｐｒｏｃ． ｔｈｅ １１６ｔｈ Ｃｏｎｖｅｎｔｉｏｎ ｏｆ ＡＥＳ , 20040508, ｐｐ．１-１１, ＡＥＳ
JPN6015000172; Ｊｏｎｇ Ｋｙｕ Ｋｉｍ， ｅｔ ａｌ．: 'Ｉｍｐｒｏｖｅｄ Ｆｒａｍｅ Ｍｏｄｅ Ｓｅｌｅｃｔｉｏｎ ｆｏｒ ＡＭＲ-ＷＢ＋ Ｂａｓｅｄ ｏｎ Ｄｅｃｉｓｉｏｎ Ｔｒｅｅ' ＩＥＩＣＥ Ｔｒａｎｓａｃｔｉｏｎｓ ｏｎ Ｉｎｆｏｒｍａｔｉｏｎ ａｎｄ Ｓｙｓｔｅｍｓ Ｖｏｌ．Ｅ９１-Ｄ， Ｎｏ．６, 20080601, ｐｐ．１８３０-１８３３, 社団法人電子情報通信学会
JPN6015000172; Ｊｏｎｇ Ｋｙｕ Ｋｉｍ， ｅｔ ａｌ．: 'Ｉｍｐｒｏｖｅｄ Ｆｒａｍｅ Ｍｏｄｅ Ｓｅｌｅｃｔｉｏｎ ｆｏｒ ＡＭＲ-ＷＢ＋ Ｂａｓｅｄ ｏｎ Ｄｅｃｉｓｉｏｎ Ｔｒｅｅ' ＩＥＩＣＥ Ｔｒａｎｓａｃｔｉｏｎｓ ｏｎ Ｉｎｆｏｒｍａｔｉｏｎ ａｎｄ Ｓｙｓｔｅｍｓ Ｖｏｌ．Ｅ９１-Ｄ， Ｎｏ．６, 20080601, ｐｐ．１８３０-１８３３, 社団法人電子情報通信学会
Attorney, Agent or Firm:
Hirohito Katsunuma
Hiroshi Yoshimoto
Hiroshi Yoshimoto
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