{"title":"A Compatible Stereophonic System for the AM Broadcast Band","authors":"J. Avins","doi":"10.1109/TBTR2.1960.4503121","DOIUrl":null,"url":null,"abstract":"Stereophonic broadcasting presents a variety of problems, including compatibility, out-of-band radiation, stereo performance, distortion, signal-to-noise, receiver tuning, and receiver cost. Possible system solutions can be classified as either ``multiplicative'' or ``additive,'' depending upon whether the quadrature sidebands representative of the stereo information (L-R) are modulated by the envelope information (L+R), or are essentially independent of the envelope information, respectively. The preferred AM-FM system uses a pre-emphasized (L-R) signal to frequency modulate the carrier which is then amplitude modulated with (L+R). Stereophonic field test transmissions over Radio Station WNBC have demonstrated compatibility with existing monophonic receivers and excellent reception on stereophonic receivers of simple design.","PeriodicalId":136909,"journal":{"name":"Ire Transactions on Broadcast and Television Receivers","volume":"29 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1960-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ire Transactions on Broadcast and Television Receivers","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/TBTR2.1960.4503121","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5
Abstract
Stereophonic broadcasting presents a variety of problems, including compatibility, out-of-band radiation, stereo performance, distortion, signal-to-noise, receiver tuning, and receiver cost. Possible system solutions can be classified as either ``multiplicative'' or ``additive,'' depending upon whether the quadrature sidebands representative of the stereo information (L-R) are modulated by the envelope information (L+R), or are essentially independent of the envelope information, respectively. The preferred AM-FM system uses a pre-emphasized (L-R) signal to frequency modulate the carrier which is then amplitude modulated with (L+R). Stereophonic field test transmissions over Radio Station WNBC have demonstrated compatibility with existing monophonic receivers and excellent reception on stereophonic receivers of simple design.