# US 10,121,487 B2 · Signaling processor capable of generating and synthesizing high frequency recover signal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,121,487 B2 - Document ID: US10121487B2 - Status: Granted - Kind: B2 - Application number: 15/813,607 - Filed: 2017-11-15 - Published: 2018-05-24 - Granted: 2018-11-06 - Earliest claimed: 2016-11-18 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Anant Baijal; Hyeon Sik Jeong; Byeong Seob Ko; Hyunjoo Chung; Sang Mo Son - Web page: https://patentgrep.com/patent/US10121487B2 ## CPC - G10L 19/265: {Pre-filtering, e.g. high frequency emphasis prior to encoding} - G10L 19/0208: {Subband vocoders} - G10L 19/022: Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring - G10L 19/08: Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters - G10L 19/24: Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding - G10L 21/0388: Details of processing therefor - G10L: SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING ## Abstract A signaling processor is provided. The signaling processor includes a frequency domain processing module configured to generate a cut-off frequency of an input signal and to generate level information for adjusting a level of a high frequency recovery signal and a time domain processing module configured to receive the cut-off frequency and the level information from the frequency domain processing module, to generate a signal having a frequency greater than or equal to the cut-off frequency using part of a signal of a frequency lower than the cut-off frequency in the input signal, to generate the high frequency recovery signal by adjusting a level of the generated signal using the level information, and to synthesize the high frequency recovery signal with the input signal. ## Claims ### Claim 1 A signaling processor, comprising: a frequency domain processing module comprising processing circuitry configured to generate a cut-off frequency of an input signal and to generate level information for adjusting a level of a high frequency recovery signal; and a time domain processing module comprising processing circuitry configured to receive the cut-off frequency and the level information from the frequency domain processing module, to generate a signal having a frequency greater than or equal to the cut-off frequency using part of a signal having a frequency lower than the cut-off frequency in the input signal, to generate the high frequency recovery signal by adjusting a level of the generated signal using the level information, and to synthesize the high frequency recovery signal with the input signal. ### Claim 2 (depends on 1) The signaling processor of claim 1, wherein the input signal comprises additional information about a format of the input signal, and wherein the frequency domain processing module is configured to: generate the cut-off frequency in a frequency band corresponding to the additional information. ### Claim 3 (depends on 2) The signaling processor of claim 2, wherein the frequency domain processing module is configured to: generate the cut-off frequency in a band between a first frequency lower than a frequency corresponding to the additional information and a second frequency corresponding to ½ of a sampling frequency of the input signal. ### Claim 4 (depends on 2) The signaling processor of claim 2, wherein the frequency domain processing module is configured to: generate one of frequencies included in a frequency band having a greatest level difference between a peak and a valley in the input signal of the frequency band corresponding to the additional information as the cut-off frequency. ### Claim 5 (depends on 1) The signaling processor of claim 1, wherein the time domain processing module is configured to: generate the signal having a frequency greater than or equal to the cut-off frequency using a signal between a frequency corresponding to ½ of the cut-off frequency and the cut-off frequency in the input signal. ### Claim 6 (depends on 1) The signaling processor of claim 1, wherein the time domain processing module is configured to: generate harmonics using part of a signal of a frequency lower than the cut-off frequency in the input signal; and generate the signal having a frequency greater than or equal to the cut-off frequency using the generated harmonics. ### Claim 7 (depends on 6) The signaling processor of claim 6, wherein the harmonics comprise first harmonics and second harmonics, wherein the time domain processing module is configured to: amplify the first harmonics and the second harmonics by different gain values, respectively; and generate the signal having a frequency greater than or equal to the cut-off frequency using the amplified first harmonics and the amplified second harmonics. ### Claim 8 (depends on 1) The signaling processor of claim 1, wherein the frequency domain processing module is configured to: divide a frequency band lower than the cut-off frequency into a first plurality of frequency bands; and generate the level information of the high frequency recovery signal using a level value of each of the first plurality of frequency bands of the input signal. ### Claim 9 (depends on 8) The signaling processor of claim 8, wherein the frequency domain processing module is configured to: divide a frequency band between a frequency corresponding to ½ of the cut-off frequency and the cut-off frequency into the first plurality of frequency bands; and generate the cut-off frequency and the level information of the high frequency recovery signal corresponding to each of bands in which a ½ band of a sampling frequency of the input signal is divided into a same number as the number of the first plurality of frequency bands. ### Claim 10 (depends on 8) The signaling processor of claim 8, wherein the level information of the high frequency recovery signal comprises: a gain value based on a difference between average level values of a frequency band adjacent to each of the first plurality of frequency bands of the input signal. ### Claim 11 (depends on 1) The signaling processor of claim 1, wherein the time domain processing module is configured to: receive the cut-off frequency and the level information from the frequency domain processing module; adjust a level of part of a signal having a frequency lower than the cut-off frequency in the input signal using the level information; generate the high frequency recovery signal using the signal, the level of which is adjusted; and synthesize the high frequency recovery signal with the input signal. ### Claim 12 A method controlling a signaling processor, the method comprising: generating a cut-off frequency of an input signal and level information for adjusting a level of a high frequency recovery signal in a frequency domain; generating a signal having a frequency greater than or equal to the cut-off frequency using part of a signal having a frequency lower than the cut-off frequency in the input signal in a time domain; generating the high frequency recovery signal by adjusting a level of the generated signal using the level information in the time domain; and synthesizing the high frequency recovery signal with the input signal in the time domain. ### Claim 13 (depends on 12) The method of claim 12, wherein the generating of the cut-off frequency comprises: generating the cut-off frequency in a frequency band corresponding to additional information about a format of the input signal, the additional information being included in the input signal. ### Claim 14 (depends on 13) The method of claim 13, wherein the generating of the cut-off frequency in the frequency band corresponding to the additional information comprises: generating the cut-off frequency in a band between a first frequency lower than a frequency corresponding to the additional information and a second frequency corresponding to ½ of a sampling frequency of the input signal. ### Claim 15 (depends on 13) The method of claim 13, wherein the generating of the cut-off frequency in the frequency band corresponding to the additional information comprises: generating one of frequencies included in a frequency band with a greatest level difference between a peak and a valley in the input signal of the frequency band corresponding to the additional information, as the cut-off frequency. ### Claim 16 (depends on 12) The method of claim 12, wherein the generating of the signal of the cut-off frequency or more comprises: generating the signal having a frequency greater than or equal to the cut-off frequency using a signal between a frequency corresponding to ½ of the cut-off frequency and the cut-off frequency in the input signal. ### Claim 17 (depends on 12) The method of claim 12, wherein the generating of the signal of the cut-off frequency or more comprises: generating harmonics using part of a signal having a frequency lower than the cut-off frequency in the input signal; and generating the signal having a frequency greater than or equal to the cut-off frequency using the generated harmonics. ### Claim 18 (depends on 17) The method of claim 17, wherein the harmonics comprise first harmonics and second harmonics, wherein the generating of the signal having a frequency greater than or equal to the cut-off frequency comprises: amplifying the first harmonics and the second harmonics by different gain values, respectively; and generating the signal having a frequency greater than or equal to the cut-off frequency using the amplified first harmonics and the amplified second harmonics. ### Claim 19 (depends on 12) The method of claim 12, wherein the generating of the level information for adjusting the level of the high frequency recovery signal comprises: dividing a frequency band lower than the cut-off frequency into a first plurality of frequency bands; and generating the level information of the high frequency recovery signal using a level value of each of the first plurality of frequency bands of the input signal. ### Claim 20 (depends on 19) The method of claim 19, wherein the dividing into the first plurality of frequency bands comprises: dividing a frequency band between a frequency corresponding to ½ of the cut-off frequency and the cut-off frequency into the first plurality of frequency bands, and wherein the generating of the level information of the high frequency recovery signal comprises: generating the cut-off frequency and the level information of the high frequency recovery signal corresponding to each of bands in which a ½ band of a sampling frequency of the input signal is divided into a same number as the number of the first plurality of frequency bands.